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Finding the Fourth Proportional to 21,951.75, 32,931.78 and 8,805.15

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Solution

The fourth proportional to 21,951.75, 32,931.78 and 8,805.15 is: 13,209.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.75 : 32,931.78 = 8,805.15 : x
  2. Step 2: Convert to fraction form
    21,951.75/32,931.78 = 8,805.15/x
  3. Step 3: Cross multiply
    21,951.75x = 32,931.78 × 8,805.15
  4. Step 4: Simplify right side
    21,951.75x = 289,969,262.67
  5. Step 5: Solve for x
    x = 289,969,262.67/21,951.75
  6. Step 6: Final answer
    x = 13,209.39

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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.