Home / 8,121.60-12,178.08-2,572.56

Finding the Fourth Proportional to 8,121.60, 12,178.08 and 2,572.56

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Solution

The fourth proportional to 8,121.60, 12,178.08 and 2,572.56 is: 3,857.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.60 : 12,178.08 = 2,572.56 : x
  2. Step 2: Convert to fraction form
    8,121.60/12,178.08 = 2,572.56/x
  3. Step 3: Cross multiply
    8,121.60x = 12,178.08 × 2,572.56
  4. Step 4: Simplify right side
    8,121.60x = 31,328,841.48
  5. Step 5: Solve for x
    x = 31,328,841.48/8,121.60
  6. Step 6: Final answer
    x = 3,857.47

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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.