Home / 20,943.36-28,902.06-11,512.20

Finding the Fourth Proportional to 20,943.36, 28,902.06 and 11,512.20

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Solution

The fourth proportional to 20,943.36, 28,902.06 and 11,512.20 is: 15,886.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.36 : 28,902.06 = 11,512.20 : x
  2. Step 2: Convert to fraction form
    20,943.36/28,902.06 = 11,512.20/x
  3. Step 3: Cross multiply
    20,943.36x = 28,902.06 × 11,512.20
  4. Step 4: Simplify right side
    20,943.36x = 332,726,295.13
  5. Step 5: Solve for x
    x = 332,726,295.13/20,943.36
  6. Step 6: Final answer
    x = 15,886.96

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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.