Home / 13,721.28-18,938.10-7,753.02

Finding the Fourth Proportional to 13,721.28, 18,938.10 and 7,753.02

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Solution

The fourth proportional to 13,721.28, 18,938.10 and 7,753.02 is: 10,700.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.28 : 18,938.10 = 7,753.02 : x
  2. Step 2: Convert to fraction form
    13,721.28/18,938.10 = 7,753.02/x
  3. Step 3: Cross multiply
    13,721.28x = 18,938.10 × 7,753.02
  4. Step 4: Simplify right side
    13,721.28x = 146,827,468.06
  5. Step 5: Solve for x
    x = 146,827,468.06/13,721.28
  6. Step 6: Final answer
    x = 10,700.71

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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.