Home / 20,863.08-31,294.68-5,280.70

Finding the Fourth Proportional to 20,863.08, 31,294.68 and 5,280.70

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Solution

The fourth proportional to 20,863.08, 31,294.68 and 5,280.70 is: 7,921.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.08 : 31,294.68 = 5,280.70 : x
  2. Step 2: Convert to fraction form
    20,863.08/31,294.68 = 5,280.70/x
  3. Step 3: Cross multiply
    20,863.08x = 31,294.68 × 5,280.70
  4. Step 4: Simplify right side
    20,863.08x = 165,257,816.68
  5. Step 5: Solve for x
    x = 165,257,816.68/20,863.08
  6. Step 6: Final answer
    x = 7,921.07

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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.