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Finding the Fourth Proportional to 8,275.76, 12,402.80 and 7,113.68

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Solution

The fourth proportional to 8,275.76, 12,402.80 and 7,113.68 is: 10,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,275.76 : 12,402.80 = 7,113.68 : x
  2. Step 2: Convert to fraction form
    8,275.76/12,402.80 = 7,113.68/x
  3. Step 3: Cross multiply
    8,275.76x = 12,402.80 × 7,113.68
  4. Step 4: Simplify right side
    8,275.76x = 88,229,550.30
  5. Step 5: Solve for x
    x = 88,229,550.30/8,275.76
  6. Step 6: Final answer
    x = 10,661.20

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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.