Home / 20,609.12-30,916.16-7,279.38

Finding the Fourth Proportional to 20,609.12, 30,916.16 and 7,279.38

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Solution

The fourth proportional to 20,609.12, 30,916.16 and 7,279.38 is: 10,919.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.12 : 30,916.16 = 7,279.38 : x
  2. Step 2: Convert to fraction form
    20,609.12/30,916.16 = 7,279.38/x
  3. Step 3: Cross multiply
    20,609.12x = 30,916.16 × 7,279.38
  4. Step 4: Simplify right side
    20,609.12x = 225,050,476.78
  5. Step 5: Solve for x
    x = 225,050,476.78/20,609.12
  6. Step 6: Final answer
    x = 10,919.95

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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.