Home / 20,288.16-30,432.24-6,438.24

Finding the Fourth Proportional to 20,288.16, 30,432.24 and 6,438.24

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Solution

The fourth proportional to 20,288.16, 30,432.24 and 6,438.24 is: 9,657.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.16 : 30,432.24 = 6,438.24 : x
  2. Step 2: Convert to fraction form
    20,288.16/30,432.24 = 6,438.24/x
  3. Step 3: Cross multiply
    20,288.16x = 30,432.24 × 6,438.24
  4. Step 4: Simplify right side
    20,288.16x = 195,930,064.86
  5. Step 5: Solve for x
    x = 195,930,064.86/20,288.16
  6. Step 6: Final answer
    x = 9,657.36

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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.