Home / 15,765.45-21,752.19-9,391.56

Finding the Fourth Proportional to 15,765.45, 21,752.19 and 9,391.56

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Solution

The fourth proportional to 15,765.45, 21,752.19 and 9,391.56 is: 12,957.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765.45 : 21,752.19 = 9,391.56 : x
  2. Step 2: Convert to fraction form
    15,765.45/21,752.19 = 9,391.56/x
  3. Step 3: Cross multiply
    15,765.45x = 21,752.19 × 9,391.56
  4. Step 4: Simplify right side
    15,765.45x = 204,286,997.52
  5. Step 5: Solve for x
    x = 204,286,997.52/15,765.45
  6. Step 6: Final answer
    x = 12,957.89

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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.