Home / 20,531.75-28,333.82-11,100.32

Finding the Fourth Proportional to 20,531.75, 28,333.82 and 11,100.32

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Solution

The fourth proportional to 20,531.75, 28,333.82 and 11,100.32 is: 15,318.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.75 : 28,333.82 = 11,100.32 : x
  2. Step 2: Convert to fraction form
    20,531.75/28,333.82 = 11,100.32/x
  3. Step 3: Cross multiply
    20,531.75x = 28,333.82 × 11,100.32
  4. Step 4: Simplify right side
    20,531.75x = 314,514,271.65
  5. Step 5: Solve for x
    x = 314,514,271.65/20,531.75
  6. Step 6: Final answer
    x = 15,318.43

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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.