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Finding the Fourth Proportional to 15,147.65, 20,890.15 and 9,482.92

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Solution

The fourth proportional to 15,147.65, 20,890.15 and 9,482.92 is: 13,077.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,147.65 : 20,890.15 = 9,482.92 : x
  2. Step 2: Convert to fraction form
    15,147.65/20,890.15 = 9,482.92/x
  3. Step 3: Cross multiply
    15,147.65x = 20,890.15 × 9,482.92
  4. Step 4: Simplify right side
    15,147.65x = 198,099,621.24
  5. Step 5: Solve for x
    x = 198,099,621.24/15,147.65
  6. Step 6: Final answer
    x = 13,077.91

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Double scale
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Similar ratio
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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.