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Finding the Fourth Proportional to 18,780.66, 28,170.99 and 15,266.48

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Solution

The fourth proportional to 18,780.66, 28,170.99 and 15,266.48 is: 22,899.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.66 : 28,170.99 = 15,266.48 : x
  2. Step 2: Convert to fraction form
    18,780.66/28,170.99 = 15,266.48/x
  3. Step 3: Cross multiply
    18,780.66x = 28,170.99 × 15,266.48
  4. Step 4: Simplify right side
    18,780.66x = 430,071,714.56
  5. Step 5: Solve for x
    x = 430,071,714.56/18,780.66
  6. Step 6: Final answer
    x = 22,899.71

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.