Home / 20,191.40-30,288.45-6,864.20

Finding the Fourth Proportional to 20,191.40, 30,288.45 and 6,864.20

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Solution

The fourth proportional to 20,191.40, 30,288.45 and 6,864.20 is: 10,296.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.40 : 30,288.45 = 6,864.20 : x
  2. Step 2: Convert to fraction form
    20,191.40/30,288.45 = 6,864.20/x
  3. Step 3: Cross multiply
    20,191.40x = 30,288.45 × 6,864.20
  4. Step 4: Simplify right side
    20,191.40x = 207,905,978.49
  5. Step 5: Solve for x
    x = 207,905,978.49/20,191.40
  6. Step 6: Final answer
    x = 10,296.76

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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.