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Finding the Fourth Proportional to 28,291.97, 42,437.96 and 7,515.47

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Solution

The fourth proportional to 28,291.97, 42,437.96 and 7,515.47 is: 11,273.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.97 : 42,437.96 = 7,515.47 : x
  2. Step 2: Convert to fraction form
    28,291.97/42,437.96 = 7,515.47/x
  3. Step 3: Cross multiply
    28,291.97x = 42,437.96 × 7,515.47
  4. Step 4: Simplify right side
    28,291.97x = 318,940,965.47
  5. Step 5: Solve for x
    x = 318,940,965.47/28,291.97
  6. Step 6: Final answer
    x = 11,273.20

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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.