Home / 20,084.20-30,131.10-9,687.40

Finding the Fourth Proportional to 20,084.20, 30,131.10 and 9,687.40

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Solution

The fourth proportional to 20,084.20, 30,131.10 and 9,687.40 is: 14,533.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,084.20 : 30,131.10 = 9,687.40 : x
  2. Step 2: Convert to fraction form
    20,084.20/30,131.10 = 9,687.40/x
  3. Step 3: Cross multiply
    20,084.20x = 30,131.10 × 9,687.40
  4. Step 4: Simplify right side
    20,084.20x = 291,892,018.14
  5. Step 5: Solve for x
    x = 291,892,018.14/20,084.20
  6. Step 6: Final answer
    x = 14,533.42

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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.