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Finding the Fourth Proportional to 15,166.60, 20,929.86 and 8,877.72

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Solution

The fourth proportional to 15,166.60, 20,929.86 and 8,877.72 is: 12,251.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,166.60 : 20,929.86 = 8,877.72 : x
  2. Step 2: Convert to fraction form
    15,166.60/20,929.86 = 8,877.72/x
  3. Step 3: Cross multiply
    15,166.60x = 20,929.86 × 8,877.72
  4. Step 4: Simplify right side
    15,166.60x = 185,809,436.72
  5. Step 5: Solve for x
    x = 185,809,436.72/15,166.60
  6. Step 6: Final answer
    x = 12,251.23

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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.