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Finding the Fourth Proportional to 8,862.80, 13,294.68 and 6,390.80

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Solution

The fourth proportional to 8,862.80, 13,294.68 and 6,390.80 is: 9,586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,862.80 : 13,294.68 = 6,390.80 : x
  2. Step 2: Convert to fraction form
    8,862.80/13,294.68 = 6,390.80/x
  3. Step 3: Cross multiply
    8,862.80x = 13,294.68 × 6,390.80
  4. Step 4: Simplify right side
    8,862.80x = 84,963,640.94
  5. Step 5: Solve for x
    x = 84,963,640.94/8,862.80
  6. Step 6: Final answer
    x = 9,586.55

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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.