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Finding the Fourth Proportional to 15,902.72, 21,945.76 and 8,732.64

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Solution

The fourth proportional to 15,902.72, 21,945.76 and 8,732.64 is: 12,051.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,902.72 : 21,945.76 = 8,732.64 : x
  2. Step 2: Convert to fraction form
    15,902.72/21,945.76 = 8,732.64/x
  3. Step 3: Cross multiply
    15,902.72x = 21,945.76 × 8,732.64
  4. Step 4: Simplify right side
    15,902.72x = 191,644,421.61
  5. Step 5: Solve for x
    x = 191,644,421.61/15,902.72
  6. Step 6: Final answer
    x = 12,051.05

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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.