Home / 13,142.44-18,135.54-7,173.76

Finding the Fourth Proportional to 13,142.44, 18,135.54 and 7,173.76

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Solution

The fourth proportional to 13,142.44, 18,135.54 and 7,173.76 is: 9,899.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.44 : 18,135.54 = 7,173.76 : x
  2. Step 2: Convert to fraction form
    13,142.44/18,135.54 = 7,173.76/x
  3. Step 3: Cross multiply
    13,142.44x = 18,135.54 × 7,173.76
  4. Step 4: Simplify right side
    13,142.44x = 130,100,011.43
  5. Step 5: Solve for x
    x = 130,100,011.43/13,142.44
  6. Step 6: Final answer
    x = 9,899.23

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Half scale
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Double scale
Find fourth proportional to 13,143.44, 18,136.92 and 7,174.76
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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.