Home / 13,778.40-19,014.24-7,490.76

Finding the Fourth Proportional to 13,778.40, 19,014.24 and 7,490.76

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Solution

The fourth proportional to 13,778.40, 19,014.24 and 7,490.76 is: 10,337.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.40 : 19,014.24 = 7,490.76 : x
  2. Step 2: Convert to fraction form
    13,778.40/19,014.24 = 7,490.76/x
  3. Step 3: Cross multiply
    13,778.40x = 19,014.24 × 7,490.76
  4. Step 4: Simplify right side
    13,778.40x = 142,431,108.42
  5. Step 5: Solve for x
    x = 142,431,108.42/13,778.40
  6. Step 6: Final answer
    x = 10,337.27

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Find fourth proportional to 6,889.20, 9,507.12 and 3,745.38
Half scale
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Double scale
Find fourth proportional to 13,779.40, 19,015.62 and 7,491.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.