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Finding the Fourth Proportional to 8,639.11, 12,884.27 and 8,483.59

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Solution

The fourth proportional to 8,639.11, 12,884.27 and 8,483.59 is: 12,652.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.11 : 12,884.27 = 8,483.59 : x
  2. Step 2: Convert to fraction form
    8,639.11/12,884.27 = 8,483.59/x
  3. Step 3: Cross multiply
    8,639.11x = 12,884.27 × 8,483.59
  4. Step 4: Simplify right side
    8,639.11x = 109,304,864.13
  5. Step 5: Solve for x
    x = 109,304,864.13/8,639.11
  6. Step 6: Final answer
    x = 12,652.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.