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Finding the Fourth Proportional to 8,488.80, 12,718.80 and 7,250.40

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Solution

The fourth proportional to 8,488.80, 12,718.80 and 7,250.40 is: 10,863.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.80 : 12,718.80 = 7,250.40 : x
  2. Step 2: Convert to fraction form
    8,488.80/12,718.80 = 7,250.40/x
  3. Step 3: Cross multiply
    8,488.80x = 12,718.80 × 7,250.40
  4. Step 4: Simplify right side
    8,488.80x = 92,216,387.52
  5. Step 5: Solve for x
    x = 92,216,387.52/8,488.80
  6. Step 6: Final answer
    x = 10,863.30

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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.