Home / 13,439.05-18,545.87-7,471.28

Finding the Fourth Proportional to 13,439.05, 18,545.87 and 7,471.28

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Solution

The fourth proportional to 13,439.05, 18,545.87 and 7,471.28 is: 10,310.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.05 : 18,545.87 = 7,471.28 : x
  2. Step 2: Convert to fraction form
    13,439.05/18,545.87 = 7,471.28/x
  3. Step 3: Cross multiply
    13,439.05x = 18,545.87 × 7,471.28
  4. Step 4: Simplify right side
    13,439.05x = 138,561,387.61
  5. Step 5: Solve for x
    x = 138,561,387.61/13,439.05
  6. Step 6: Final answer
    x = 10,310.36

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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.