Home / 15,388.20-21,235.74-8,314.64

Finding the Fourth Proportional to 15,388.20, 21,235.74 and 8,314.64

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Solution

The fourth proportional to 15,388.20, 21,235.74 and 8,314.64 is: 11,474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.20 : 21,235.74 = 8,314.64 : x
  2. Step 2: Convert to fraction form
    15,388.20/21,235.74 = 8,314.64/x
  3. Step 3: Cross multiply
    15,388.20x = 21,235.74 × 8,314.64
  4. Step 4: Simplify right side
    15,388.20x = 176,567,427.05
  5. Step 5: Solve for x
    x = 176,567,427.05/15,388.20
  6. Step 6: Final answer
    x = 11,474.21

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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.