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Finding the Fourth Proportional to 28,321.67, 42,487.09 and 9,340.63

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Solution

The fourth proportional to 28,321.67, 42,487.09 and 9,340.63 is: 14,012.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.67 : 42,487.09 = 9,340.63 : x
  2. Step 2: Convert to fraction form
    28,321.67/42,487.09 = 9,340.63/x
  3. Step 3: Cross multiply
    28,321.67x = 42,487.09 × 9,340.63
  4. Step 4: Simplify right side
    28,321.67x = 396,856,140.76
  5. Step 5: Solve for x
    x = 396,856,140.76/28,321.67
  6. Step 6: Final answer
    x = 14,012.46

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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.