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Finding the Fourth Proportional to 15,777.72, 21,773.31 and 8,704.11

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Solution

The fourth proportional to 15,777.72, 21,773.31 and 8,704.11 is: 12,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.72 : 21,773.31 = 8,704.11 : x
  2. Step 2: Convert to fraction form
    15,777.72/21,773.31 = 8,704.11/x
  3. Step 3: Cross multiply
    15,777.72x = 21,773.31 × 8,704.11
  4. Step 4: Simplify right side
    15,777.72x = 189,517,285.30
  5. Step 5: Solve for x
    x = 189,517,285.30/15,777.72
  6. Step 6: Final answer
    x = 12,011.70

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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.