Home / 20,111.40-30,177.90-8,425.80

Finding the Fourth Proportional to 20,111.40, 30,177.90 and 8,425.80

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Solution

The fourth proportional to 20,111.40, 30,177.90 and 8,425.80 is: 12,643.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.40 : 30,177.90 = 8,425.80 : x
  2. Step 2: Convert to fraction form
    20,111.40/30,177.90 = 8,425.80/x
  3. Step 3: Cross multiply
    20,111.40x = 30,177.90 × 8,425.80
  4. Step 4: Simplify right side
    20,111.40x = 254,272,949.82
  5. Step 5: Solve for x
    x = 254,272,949.82/20,111.40
  6. Step 6: Final answer
    x = 12,643.22

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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.