Home / 28,385.40-39,171.87-16,455.66

Finding the Fourth Proportional to 28,385.40, 39,171.87 and 16,455.66

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Solution

The fourth proportional to 28,385.40, 39,171.87 and 16,455.66 is: 22,708.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.40 : 39,171.87 = 16,455.66 : x
  2. Step 2: Convert to fraction form
    28,385.40/39,171.87 = 16,455.66/x
  3. Step 3: Cross multiply
    28,385.40x = 39,171.87 × 16,455.66
  4. Step 4: Simplify right side
    28,385.40x = 644,598,974.28
  5. Step 5: Solve for x
    x = 644,598,974.28/28,385.40
  6. Step 6: Final answer
    x = 22,708.82

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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.