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Finding the Fourth Proportional to 8,587.70, 12,866.43 and 7,521.61

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Solution

The fourth proportional to 8,587.70, 12,866.43 and 7,521.61 is: 11,269.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,587.70 : 12,866.43 = 7,521.61 : x
  2. Step 2: Convert to fraction form
    8,587.70/12,866.43 = 7,521.61/x
  3. Step 3: Cross multiply
    8,587.70x = 12,866.43 × 7,521.61
  4. Step 4: Simplify right side
    8,587.70x = 96,776,204.22
  5. Step 5: Solve for x
    x = 96,776,204.22/8,587.70
  6. Step 6: Final answer
    x = 11,269.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.