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Finding the Fourth Proportional to 15,658.61, 21,608.70 and 8,585.03

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Solution

The fourth proportional to 15,658.61, 21,608.70 and 8,585.03 is: 11,847.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.61 : 21,608.70 = 8,585.03 : x
  2. Step 2: Convert to fraction form
    15,658.61/21,608.70 = 8,585.03/x
  3. Step 3: Cross multiply
    15,658.61x = 21,608.70 × 8,585.03
  4. Step 4: Simplify right side
    15,658.61x = 185,511,337.76
  5. Step 5: Solve for x
    x = 185,511,337.76/15,658.61
  6. Step 6: Final answer
    x = 11,847.24

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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.