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Finding the Fourth Proportional to 18,712.80, 28,073.10 and 6,236.70

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Solution

The fourth proportional to 18,712.80, 28,073.10 and 6,236.70 is: 9,356.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.80 : 28,073.10 = 6,236.70 : x
  2. Step 2: Convert to fraction form
    18,712.80/28,073.10 = 6,236.70/x
  3. Step 3: Cross multiply
    18,712.80x = 28,073.10 × 6,236.70
  4. Step 4: Simplify right side
    18,712.80x = 175,083,502.77
  5. Step 5: Solve for x
    x = 175,083,502.77/18,712.80
  6. Step 6: Final answer
    x = 9,356.35

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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.