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Finding the Fourth Proportional to 12,500.76, 18,750.65 and 3,140.85

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Solution

The fourth proportional to 12,500.76, 18,750.65 and 3,140.85 is: 4,711.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,500.76 : 18,750.65 = 3,140.85 : x
  2. Step 2: Convert to fraction form
    12,500.76/18,750.65 = 3,140.85/x
  3. Step 3: Cross multiply
    12,500.76x = 18,750.65 × 3,140.85
  4. Step 4: Simplify right side
    12,500.76x = 58,892,963.35
  5. Step 5: Solve for x
    x = 58,892,963.35/12,500.76
  6. Step 6: Final answer
    x = 4,711.15

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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.