Home / 20,439.20-30,660.24-5,646.98

Finding the Fourth Proportional to 20,439.20, 30,660.24 and 5,646.98

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Solution

The fourth proportional to 20,439.20, 30,660.24 and 5,646.98 is: 8,470.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.20 : 30,660.24 = 5,646.98 : x
  2. Step 2: Convert to fraction form
    20,439.20/30,660.24 = 5,646.98/x
  3. Step 3: Cross multiply
    20,439.20x = 30,660.24 × 5,646.98
  4. Step 4: Simplify right side
    20,439.20x = 173,137,762.08
  5. Step 5: Solve for x
    x = 173,137,762.08/20,439.20
  6. Step 6: Final answer
    x = 8,470.87

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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.