Home / 20,143.40-27,798.12-11,191.48

Finding the Fourth Proportional to 20,143.40, 27,798.12 and 11,191.48

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Solution

The fourth proportional to 20,143.40, 27,798.12 and 11,191.48 is: 15,444.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.40 : 27,798.12 = 11,191.48 : x
  2. Step 2: Convert to fraction form
    20,143.40/27,798.12 = 11,191.48/x
  3. Step 3: Cross multiply
    20,143.40x = 27,798.12 × 11,191.48
  4. Step 4: Simplify right side
    20,143.40x = 311,102,034.52
  5. Step 5: Solve for x
    x = 311,102,034.52/20,143.40
  6. Step 6: Final answer
    x = 15,444.37

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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.