Home / 20,306.68-30,431.40-9,621.70

Finding the Fourth Proportional to 20,306.68, 30,431.40 and 9,621.70

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Solution

The fourth proportional to 20,306.68, 30,431.40 and 9,621.70 is: 14,418.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.68 : 30,431.40 = 9,621.70 : x
  2. Step 2: Convert to fraction form
    20,306.68/30,431.40 = 9,621.70/x
  3. Step 3: Cross multiply
    20,306.68x = 30,431.40 × 9,621.70
  4. Step 4: Simplify right side
    20,306.68x = 292,801,801.38
  5. Step 5: Solve for x
    x = 292,801,801.38/20,306.68
  6. Step 6: Final answer
    x = 14,418.99

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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.