Home / 20,442.32-30,539.12-12,987.04

Finding the Fourth Proportional to 20,442.32, 30,539.12 and 12,987.04

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Solution

The fourth proportional to 20,442.32, 30,539.12 and 12,987.04 is: 19,401.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.32 : 30,539.12 = 12,987.04 : x
  2. Step 2: Convert to fraction form
    20,442.32/30,539.12 = 12,987.04/x
  3. Step 3: Cross multiply
    20,442.32x = 30,539.12 × 12,987.04
  4. Step 4: Simplify right side
    20,442.32x = 396,612,773.00
  5. Step 5: Solve for x
    x = 396,612,773.00/20,442.32
  6. Step 6: Final answer
    x = 19,401.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.