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Finding the Fourth Proportional to 15,068.76, 20,793.60 and 8,781.72

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Solution

The fourth proportional to 15,068.76, 20,793.60 and 8,781.72 is: 12,118.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,068.76 : 20,793.60 = 8,781.72 : x
  2. Step 2: Convert to fraction form
    15,068.76/20,793.60 = 8,781.72/x
  3. Step 3: Cross multiply
    15,068.76x = 20,793.60 × 8,781.72
  4. Step 4: Simplify right side
    15,068.76x = 182,603,572.99
  5. Step 5: Solve for x
    x = 182,603,572.99/15,068.76
  6. Step 6: Final answer
    x = 12,118.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.