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Finding the Fourth Proportional to 21,591.86, 32,373.87 and 9,108.54

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Solution

The fourth proportional to 21,591.86, 32,373.87 and 9,108.54 is: 13,656.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.86 : 32,373.87 = 9,108.54 : x
  2. Step 2: Convert to fraction form
    21,591.86/32,373.87 = 9,108.54/x
  3. Step 3: Cross multiply
    21,591.86x = 32,373.87 × 9,108.54
  4. Step 4: Simplify right side
    21,591.86x = 294,878,689.85
  5. Step 5: Solve for x
    x = 294,878,689.85/21,591.86
  6. Step 6: Final answer
    x = 13,656.94

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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.