Home / 20,675.25-28,531.98-11,243.88

Finding the Fourth Proportional to 20,675.25, 28,531.98 and 11,243.88

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Solution

The fourth proportional to 20,675.25, 28,531.98 and 11,243.88 is: 15,516.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.25 : 28,531.98 = 11,243.88 : x
  2. Step 2: Convert to fraction form
    20,675.25/28,531.98 = 11,243.88/x
  3. Step 3: Cross multiply
    20,675.25x = 28,531.98 × 11,243.88
  4. Step 4: Simplify right side
    20,675.25x = 320,810,159.28
  5. Step 5: Solve for x
    x = 320,810,159.28/20,675.25
  6. Step 6: Final answer
    x = 15,516.63

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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.