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Finding the Fourth Proportional to 15,658.61, 21,608.78 and 8,585.02

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Solution

The fourth proportional to 15,658.61, 21,608.78 and 8,585.02 is: 11,847.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.61 : 21,608.78 = 8,585.02 : x
  2. Step 2: Convert to fraction form
    15,658.61/21,608.78 = 8,585.02/x
  3. Step 3: Cross multiply
    15,658.61x = 21,608.78 × 8,585.02
  4. Step 4: Simplify right side
    15,658.61x = 185,511,711.53
  5. Step 5: Solve for x
    x = 185,511,711.53/15,658.61
  6. Step 6: Final answer
    x = 11,847.27

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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.