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Finding the Fourth Proportional to 15,774.88, 21,766.30 and 9,487.66

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Solution

The fourth proportional to 15,774.88, 21,766.30 and 9,487.66 is: 13,091.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,774.88 : 21,766.30 = 9,487.66 : x
  2. Step 2: Convert to fraction form
    15,774.88/21,766.30 = 9,487.66/x
  3. Step 3: Cross multiply
    15,774.88x = 21,766.30 × 9,487.66
  4. Step 4: Simplify right side
    15,774.88x = 206,511,253.86
  5. Step 5: Solve for x
    x = 206,511,253.86/15,774.88
  6. Step 6: Final answer
    x = 13,091.15

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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.