Home / 20,411.30-30,617.08-5,621.78

Finding the Fourth Proportional to 20,411.30, 30,617.08 and 5,621.78

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Solution

The fourth proportional to 20,411.30, 30,617.08 and 5,621.78 is: 8,432.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.30 : 30,617.08 = 5,621.78 : x
  2. Step 2: Convert to fraction form
    20,411.30/30,617.08 = 5,621.78/x
  3. Step 3: Cross multiply
    20,411.30x = 30,617.08 × 5,621.78
  4. Step 4: Simplify right side
    20,411.30x = 172,122,488.00
  5. Step 5: Solve for x
    x = 172,122,488.00/20,411.30
  6. Step 6: Final answer
    x = 8,432.71

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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.