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Finding the Fourth Proportional to 8,545.86, 12,819.80 and 8,079.30

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Solution

The fourth proportional to 8,545.86, 12,819.80 and 8,079.30 is: 12,119.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,545.86 : 12,819.80 = 8,079.30 : x
  2. Step 2: Convert to fraction form
    8,545.86/12,819.80 = 8,079.30/x
  3. Step 3: Cross multiply
    8,545.86x = 12,819.80 × 8,079.30
  4. Step 4: Simplify right side
    8,545.86x = 103,574,969.74
  5. Step 5: Solve for x
    x = 103,574,969.74/8,545.86
  6. Step 6: Final answer
    x = 12,119.90

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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.