Home / 20,371.61-28,112.29-11,419.70

Finding the Fourth Proportional to 20,371.61, 28,112.29 and 11,419.70

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Solution

The fourth proportional to 20,371.61, 28,112.29 and 11,419.70 is: 15,758.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.61 : 28,112.29 = 11,419.70 : x
  2. Step 2: Convert to fraction form
    20,371.61/28,112.29 = 11,419.70/x
  3. Step 3: Cross multiply
    20,371.61x = 28,112.29 × 11,419.70
  4. Step 4: Simplify right side
    20,371.61x = 321,033,749.00
  5. Step 5: Solve for x
    x = 321,033,749.00/20,371.61
  6. Step 6: Final answer
    x = 15,758.88

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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.