Home / 10,812.20-16,218.30-6,191.40

Finding the Fourth Proportional to 10,812.20, 16,218.30 and 6,191.40

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Solution

The fourth proportional to 10,812.20, 16,218.30 and 6,191.40 is: 9,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,812.20 : 16,218.30 = 6,191.40 : x
  2. Step 2: Convert to fraction form
    10,812.20/16,218.30 = 6,191.40/x
  3. Step 3: Cross multiply
    10,812.20x = 16,218.30 × 6,191.40
  4. Step 4: Simplify right side
    10,812.20x = 100,413,982.62
  5. Step 5: Solve for x
    x = 100,413,982.62/10,812.20
  6. Step 6: Final answer
    x = 9,287.10

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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.