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Finding the Fourth Proportional to 15,048.62, 20,767.12 and 8,242.62

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Solution

The fourth proportional to 15,048.62, 20,767.12 and 8,242.62 is: 11,374.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,048.62 : 20,767.12 = 8,242.62 : x
  2. Step 2: Convert to fraction form
    15,048.62/20,767.12 = 8,242.62/x
  3. Step 3: Cross multiply
    15,048.62x = 20,767.12 × 8,242.62
  4. Step 4: Simplify right side
    15,048.62x = 171,175,478.65
  5. Step 5: Solve for x
    x = 171,175,478.65/15,048.62
  6. Step 6: Final answer
    x = 11,374.83

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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.