Home / 20,127.12-30,186.90-6,976.80

Finding the Fourth Proportional to 20,127.12, 30,186.90 and 6,976.80

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Solution

The fourth proportional to 20,127.12, 30,186.90 and 6,976.80 is: 10,463.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.12 : 30,186.90 = 6,976.80 : x
  2. Step 2: Convert to fraction form
    20,127.12/30,186.90 = 6,976.80/x
  3. Step 3: Cross multiply
    20,127.12x = 30,186.90 × 6,976.80
  4. Step 4: Simplify right side
    20,127.12x = 210,607,963.92
  5. Step 5: Solve for x
    x = 210,607,963.92/20,127.12
  6. Step 6: Final answer
    x = 10,463.89

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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.