Home / 20,177.20-30,265.80-12,814.30

Finding the Fourth Proportional to 20,177.20, 30,265.80 and 12,814.30

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Solution

The fourth proportional to 20,177.20, 30,265.80 and 12,814.30 is: 19,221.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,177.20 : 30,265.80 = 12,814.30 : x
  2. Step 2: Convert to fraction form
    20,177.20/30,265.80 = 12,814.30/x
  3. Step 3: Cross multiply
    20,177.20x = 30,265.80 × 12,814.30
  4. Step 4: Simplify right side
    20,177.20x = 387,835,040.94
  5. Step 5: Solve for x
    x = 387,835,040.94/20,177.20
  6. Step 6: Final answer
    x = 19,221.45

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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.