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Finding the Fourth Proportional to 8,909.71, 12,292.08 and 6,866.21

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Solution

The fourth proportional to 8,909.71, 12,292.08 and 6,866.21 is: 9,472.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.71 : 12,292.08 = 6,866.21 : x
  2. Step 2: Convert to fraction form
    8,909.71/12,292.08 = 6,866.21/x
  3. Step 3: Cross multiply
    8,909.71x = 12,292.08 × 6,866.21
  4. Step 4: Simplify right side
    8,909.71x = 84,400,002.62
  5. Step 5: Solve for x
    x = 84,400,002.62/8,909.71
  6. Step 6: Final answer
    x = 9,472.81

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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.