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Finding the Fourth Proportional to 28,291.46, 42,437.42 and 8,571.56

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Solution

The fourth proportional to 28,291.46, 42,437.42 and 8,571.56 is: 12,857.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.46 : 42,437.42 = 8,571.56 : x
  2. Step 2: Convert to fraction form
    28,291.46/42,437.42 = 8,571.56/x
  3. Step 3: Cross multiply
    28,291.46x = 42,437.42 × 8,571.56
  4. Step 4: Simplify right side
    28,291.46x = 363,754,891.78
  5. Step 5: Solve for x
    x = 363,754,891.78/28,291.46
  6. Step 6: Final answer
    x = 12,857.41

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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.