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Finding the Fourth Proportional to 21,789.68, 32,695.32 and 8,641.76

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Solution

The fourth proportional to 21,789.68, 32,695.32 and 8,641.76 is: 12,966.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.68 : 32,695.32 = 8,641.76 : x
  2. Step 2: Convert to fraction form
    21,789.68/32,695.32 = 8,641.76/x
  3. Step 3: Cross multiply
    21,789.68x = 32,695.32 × 8,641.76
  4. Step 4: Simplify right side
    21,789.68x = 282,545,108.56
  5. Step 5: Solve for x
    x = 282,545,108.56/21,789.68
  6. Step 6: Final answer
    x = 12,966.92

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1.5x scale

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.