Home / 20,143.68-27,798.76-11,191.56

Finding the Fourth Proportional to 20,143.68, 27,798.76 and 11,191.56

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Solution

The fourth proportional to 20,143.68, 27,798.76 and 11,191.56 is: 15,444.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.68 : 27,798.76 = 11,191.56 : x
  2. Step 2: Convert to fraction form
    20,143.68/27,798.76 = 11,191.56/x
  3. Step 3: Cross multiply
    20,143.68x = 27,798.76 × 11,191.56
  4. Step 4: Simplify right side
    20,143.68x = 311,111,490.47
  5. Step 5: Solve for x
    x = 311,111,490.47/20,143.68
  6. Step 6: Final answer
    x = 15,444.62

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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.