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Finding the Fourth Proportional to 21,659.91, 32,480.15 and 9,966.75

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Solution

The fourth proportional to 21,659.91, 32,480.15 and 9,966.75 is: 14,945.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.91 : 32,480.15 = 9,966.75 : x
  2. Step 2: Convert to fraction form
    21,659.91/32,480.15 = 9,966.75/x
  3. Step 3: Cross multiply
    21,659.91x = 32,480.15 × 9,966.75
  4. Step 4: Simplify right side
    21,659.91x = 323,721,485.18
  5. Step 5: Solve for x
    x = 323,721,485.18/21,659.91
  6. Step 6: Final answer
    x = 14,945.65

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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.