Home / 31,715.20-47,569.32-12,748

Finding the Fourth Proportional to 31,715.20, 47,569.32 and 12,748

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Solution

The fourth proportional to 31,715.20, 47,569.32 and 12,748 is: 19,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,715.20 : 47,569.32 = 12,748 : x
  2. Step 2: Convert to fraction form
    31,715.20/47,569.32 = 12,748/x
  3. Step 3: Cross multiply
    31,715.20x = 47,569.32 × 12,748
  4. Step 4: Simplify right side
    31,715.20x = 606,413,691.36
  5. Step 5: Solve for x
    x = 606,413,691.36/31,715.20
  6. Step 6: Final answer
    x = 19,120.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.