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Finding the Fourth Proportional to 18,508.30, 27,766.55 and 8,642.19

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Solution

The fourth proportional to 18,508.30, 27,766.55 and 8,642.19 is: 12,965.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.30 : 27,766.55 = 8,642.19 : x
  2. Step 2: Convert to fraction form
    18,508.30/27,766.55 = 8,642.19/x
  3. Step 3: Cross multiply
    18,508.30x = 27,766.55 × 8,642.19
  4. Step 4: Simplify right side
    18,508.30x = 239,963,800.74
  5. Step 5: Solve for x
    x = 239,963,800.74/18,508.30
  6. Step 6: Final answer
    x = 12,965.20

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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.