Home / 20,398.75-28,150.87-11,446.12

Finding the Fourth Proportional to 20,398.75, 28,150.87 and 11,446.12

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Solution

The fourth proportional to 20,398.75, 28,150.87 and 11,446.12 is: 15,795.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.75 : 28,150.87 = 11,446.12 : x
  2. Step 2: Convert to fraction form
    20,398.75/28,150.87 = 11,446.12/x
  3. Step 3: Cross multiply
    20,398.75x = 28,150.87 × 11,446.12
  4. Step 4: Simplify right side
    20,398.75x = 322,218,236.12
  5. Step 5: Solve for x
    x = 322,218,236.12/20,398.75
  6. Step 6: Final answer
    x = 15,795.98

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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.