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Finding the Fourth Proportional to 15,064.52, 20,786.32 and 8,689.61

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Solution

The fourth proportional to 15,064.52, 20,786.32 and 8,689.61 is: 11,990.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,064.52 : 20,786.32 = 8,689.61 : x
  2. Step 2: Convert to fraction form
    15,064.52/20,786.32 = 8,689.61/x
  3. Step 3: Cross multiply
    15,064.52x = 20,786.32 × 8,689.61
  4. Step 4: Simplify right side
    15,064.52x = 180,625,076.96
  5. Step 5: Solve for x
    x = 180,625,076.96/15,064.52
  6. Step 6: Final answer
    x = 11,990.10

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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.