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Finding the Fourth Proportional to 15,898.66, 21,925.82 and 9,930.92

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Solution

The fourth proportional to 15,898.66, 21,925.82 and 9,930.92 is: 13,695.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.66 : 21,925.82 = 9,930.92 : x
  2. Step 2: Convert to fraction form
    15,898.66/21,925.82 = 9,930.92/x
  3. Step 3: Cross multiply
    15,898.66x = 21,925.82 × 9,930.92
  4. Step 4: Simplify right side
    15,898.66x = 217,743,479.55
  5. Step 5: Solve for x
    x = 217,743,479.55/15,898.66
  6. Step 6: Final answer
    x = 13,695.71

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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.