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Finding the Fourth Proportional to 15,167.60, 20,930.74 and 8,452.88

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Solution

The fourth proportional to 15,167.60, 20,930.74 and 8,452.88 is: 11,664.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,167.60 : 20,930.74 = 8,452.88 : x
  2. Step 2: Convert to fraction form
    15,167.60/20,930.74 = 8,452.88/x
  3. Step 3: Cross multiply
    15,167.60x = 20,930.74 × 8,452.88
  4. Step 4: Simplify right side
    15,167.60x = 176,925,033.53
  5. Step 5: Solve for x
    x = 176,925,033.53/15,167.60
  6. Step 6: Final answer
    x = 11,664.67

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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.