Home / 20,399.46-28,143.51-15,034.70

Finding the Fourth Proportional to 20,399.46, 28,143.51 and 15,034.70

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Solution

The fourth proportional to 20,399.46, 28,143.51 and 15,034.70 is: 20,742.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.46 : 28,143.51 = 15,034.70 : x
  2. Step 2: Convert to fraction form
    20,399.46/28,143.51 = 15,034.70/x
  3. Step 3: Cross multiply
    20,399.46x = 28,143.51 × 15,034.70
  4. Step 4: Simplify right side
    20,399.46x = 423,129,084.26
  5. Step 5: Solve for x
    x = 423,129,084.26/20,399.46
  6. Step 6: Final answer
    x = 20,742.18

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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.