Home / 20,266.53-30,422.27-8,428.78

Finding the Fourth Proportional to 20,266.53, 30,422.27 and 8,428.78

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Solution

The fourth proportional to 20,266.53, 30,422.27 and 8,428.78 is: 12,652.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.53 : 30,422.27 = 8,428.78 : x
  2. Step 2: Convert to fraction form
    20,266.53/30,422.27 = 8,428.78/x
  3. Step 3: Cross multiply
    20,266.53x = 30,422.27 × 8,428.78
  4. Step 4: Simplify right side
    20,266.53x = 256,422,620.93
  5. Step 5: Solve for x
    x = 256,422,620.93/20,266.53
  6. Step 6: Final answer
    x = 12,652.52

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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.