Home / 38,142.72-57,472.20-31,712.40

Finding the Fourth Proportional to 38,142.72, 57,472.20 and 31,712.40

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Solution

The fourth proportional to 38,142.72, 57,472.20 and 31,712.40 is: 47,783.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,142.72 : 57,472.20 = 31,712.40 : x
  2. Step 2: Convert to fraction form
    38,142.72/57,472.20 = 31,712.40/x
  3. Step 3: Cross multiply
    38,142.72x = 57,472.20 × 31,712.40
  4. Step 4: Simplify right side
    38,142.72x = 1,822,581,395.28
  5. Step 5: Solve for x
    x = 1,822,581,395.28/38,142.72
  6. Step 6: Final answer
    x = 47,783.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.