Home / 28,109.60-38,795.10-16,172.66

Finding the Fourth Proportional to 28,109.60, 38,795.10 and 16,172.66

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Solution

The fourth proportional to 28,109.60, 38,795.10 and 16,172.66 is: 22,320.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.60 : 38,795.10 = 16,172.66 : x
  2. Step 2: Convert to fraction form
    28,109.60/38,795.10 = 16,172.66/x
  3. Step 3: Cross multiply
    28,109.60x = 38,795.10 × 16,172.66
  4. Step 4: Simplify right side
    28,109.60x = 627,419,961.97
  5. Step 5: Solve for x
    x = 627,419,961.97/28,109.60
  6. Step 6: Final answer
    x = 22,320.49

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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.