Home / 20,143.28-27,798.04-11,191.62

Finding the Fourth Proportional to 20,143.28, 27,798.04 and 11,191.62

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Solution

The fourth proportional to 20,143.28, 27,798.04 and 11,191.62 is: 15,444.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.28 : 27,798.04 = 11,191.62 : x
  2. Step 2: Convert to fraction form
    20,143.28/27,798.04 = 11,191.62/x
  3. Step 3: Cross multiply
    20,143.28x = 27,798.04 × 11,191.62
  4. Step 4: Simplify right side
    20,143.28x = 311,105,100.42
  5. Step 5: Solve for x
    x = 311,105,100.42/20,143.28
  6. Step 6: Final answer
    x = 15,444.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.