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Finding the Fourth Proportional to 15,591.76, 21,517.06 and 9,307.78

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Solution

The fourth proportional to 15,591.76, 21,517.06 and 9,307.78 is: 12,844.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.76 : 21,517.06 = 9,307.78 : x
  2. Step 2: Convert to fraction form
    15,591.76/21,517.06 = 9,307.78/x
  3. Step 3: Cross multiply
    15,591.76x = 21,517.06 × 9,307.78
  4. Step 4: Simplify right side
    15,591.76x = 200,276,060.73
  5. Step 5: Solve for x
    x = 200,276,060.73/15,591.76
  6. Step 6: Final answer
    x = 12,844.99

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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.