Home / 20,279.56-30,419.38-6,428.52

Finding the Fourth Proportional to 20,279.56, 30,419.38 and 6,428.52

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Solution

The fourth proportional to 20,279.56, 30,419.38 and 6,428.52 is: 9,642.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.56 : 30,419.38 = 6,428.52 : x
  2. Step 2: Convert to fraction form
    20,279.56/30,419.38 = 6,428.52/x
  3. Step 3: Cross multiply
    20,279.56x = 30,419.38 × 6,428.52
  4. Step 4: Simplify right side
    20,279.56x = 195,551,592.72
  5. Step 5: Solve for x
    x = 195,551,592.72/20,279.56
  6. Step 6: Final answer
    x = 9,642.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.