Home / 20,371.42-28,112.03-11,419.50

Finding the Fourth Proportional to 20,371.42, 28,112.03 and 11,419.50

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Solution

The fourth proportional to 20,371.42, 28,112.03 and 11,419.50 is: 15,758.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.42 : 28,112.03 = 11,419.50 : x
  2. Step 2: Convert to fraction form
    20,371.42/28,112.03 = 11,419.50/x
  3. Step 3: Cross multiply
    20,371.42x = 28,112.03 × 11,419.50
  4. Step 4: Simplify right side
    20,371.42x = 321,025,417.73
  5. Step 5: Solve for x
    x = 321,025,417.73/20,371.42
  6. Step 6: Final answer
    x = 15,758.62

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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.