Home / 20,685.75-28,546.56-11,254.52

Finding the Fourth Proportional to 20,685.75, 28,546.56 and 11,254.52

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Solution

The fourth proportional to 20,685.75, 28,546.56 and 11,254.52 is: 15,531.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.75 : 28,546.56 = 11,254.52 : x
  2. Step 2: Convert to fraction form
    20,685.75/28,546.56 = 11,254.52/x
  3. Step 3: Cross multiply
    20,685.75x = 28,546.56 × 11,254.52
  4. Step 4: Simplify right side
    20,685.75x = 321,277,687.72
  5. Step 5: Solve for x
    x = 321,277,687.72/20,685.75
  6. Step 6: Final answer
    x = 15,531.35

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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.