Home / 20,380.88-28,130.28-12,002.24

Finding the Fourth Proportional to 20,380.88, 28,130.28 and 12,002.24

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Solution

The fourth proportional to 20,380.88, 28,130.28 and 12,002.24 is: 16,565.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.88 : 28,130.28 = 12,002.24 : x
  2. Step 2: Convert to fraction form
    20,380.88/28,130.28 = 12,002.24/x
  3. Step 3: Cross multiply
    20,380.88x = 28,130.28 × 12,002.24
  4. Step 4: Simplify right side
    20,380.88x = 337,626,371.83
  5. Step 5: Solve for x
    x = 337,626,371.83/20,380.88
  6. Step 6: Final answer
    x = 16,565.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.