Home / 20,188.20-30,282.30-15,809.40

Finding the Fourth Proportional to 20,188.20, 30,282.30 and 15,809.40

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Solution

The fourth proportional to 20,188.20, 30,282.30 and 15,809.40 is: 23,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.20 : 30,282.30 = 15,809.40 : x
  2. Step 2: Convert to fraction form
    20,188.20/30,282.30 = 15,809.40/x
  3. Step 3: Cross multiply
    20,188.20x = 30,282.30 × 15,809.40
  4. Step 4: Simplify right side
    20,188.20x = 478,744,993.62
  5. Step 5: Solve for x
    x = 478,744,993.62/20,188.20
  6. Step 6: Final answer
    x = 23,714.10

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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.