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Finding the Fourth Proportional to 20,561.74, 30,854.95 and 8,874.95

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Solution

The fourth proportional to 20,561.74, 30,854.95 and 8,874.95 is: 13,317.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.74 : 30,854.95 = 8,874.95 : x
  2. Step 2: Convert to fraction form
    20,561.74/30,854.95 = 8,874.95/x
  3. Step 3: Cross multiply
    20,561.74x = 30,854.95 × 8,874.95
  4. Step 4: Simplify right side
    20,561.74x = 273,835,962.04
  5. Step 5: Solve for x
    x = 273,835,962.04/20,561.74
  6. Step 6: Final answer
    x = 13,317.74

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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.