Home / 28,966.75-39,974.12-15,718.75

Finding the Fourth Proportional to 28,966.75, 39,974.12 and 15,718.75

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Solution

The fourth proportional to 28,966.75, 39,974.12 and 15,718.75 is: 21,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,966.75 : 39,974.12 = 15,718.75 : x
  2. Step 2: Convert to fraction form
    28,966.75/39,974.12 = 15,718.75/x
  3. Step 3: Cross multiply
    28,966.75x = 39,974.12 × 15,718.75
  4. Step 4: Simplify right side
    28,966.75x = 628,343,120.16
  5. Step 5: Solve for x
    x = 628,343,120.16/28,966.75
  6. Step 6: Final answer
    x = 21,691.88

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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.