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Finding the Fourth Proportional to 28,057.80, 38,719.72 and 15,482.54

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Solution

The fourth proportional to 28,057.80, 38,719.72 and 15,482.54 is: 21,365.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,057.80 : 38,719.72 = 15,482.54 : x
  2. Step 2: Convert to fraction form
    28,057.80/38,719.72 = 15,482.54/x
  3. Step 3: Cross multiply
    28,057.80x = 38,719.72 × 15,482.54
  4. Step 4: Simplify right side
    28,057.80x = 599,479,613.69
  5. Step 5: Solve for x
    x = 599,479,613.69/28,057.80
  6. Step 6: Final answer
    x = 21,365.88

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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.