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Finding the Fourth Proportional to 15,905.92, 21,951.84 and 9,618.08

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Solution

The fourth proportional to 15,905.92, 21,951.84 and 9,618.08 is: 13,273.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.92 : 21,951.84 = 9,618.08 : x
  2. Step 2: Convert to fraction form
    15,905.92/21,951.84 = 9,618.08/x
  3. Step 3: Cross multiply
    15,905.92x = 21,951.84 × 9,618.08
  4. Step 4: Simplify right side
    15,905.92x = 211,134,553.27
  5. Step 5: Solve for x
    x = 211,134,553.27/15,905.92
  6. Step 6: Final answer
    x = 13,273.96

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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.