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Finding the Fourth Proportional to 8,333.76, 12,502.40 and 3,139.52

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Solution

The fourth proportional to 8,333.76, 12,502.40 and 3,139.52 is: 4,709.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,333.76 : 12,502.40 = 3,139.52 : x
  2. Step 2: Convert to fraction form
    8,333.76/12,502.40 = 3,139.52/x
  3. Step 3: Cross multiply
    8,333.76x = 12,502.40 × 3,139.52
  4. Step 4: Simplify right side
    8,333.76x = 39,251,534.85
  5. Step 5: Solve for x
    x = 39,251,534.85/8,333.76
  6. Step 6: Final answer
    x = 4,709.94

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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.