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Finding the Fourth Proportional to 15,161.85, 20,920.86 and 8,445.96

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Solution

The fourth proportional to 15,161.85, 20,920.86 and 8,445.96 is: 11,654.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.85 : 20,920.86 = 8,445.96 : x
  2. Step 2: Convert to fraction form
    15,161.85/20,920.86 = 8,445.96/x
  3. Step 3: Cross multiply
    15,161.85x = 20,920.86 × 8,445.96
  4. Step 4: Simplify right side
    15,161.85x = 176,696,746.73
  5. Step 5: Solve for x
    x = 176,696,746.73/15,161.85
  6. Step 6: Final answer
    x = 11,654.04

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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.