Home / 20,481.75-28,264.35-11,407.05

Finding the Fourth Proportional to 20,481.75, 28,264.35 and 11,407.05

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Solution

The fourth proportional to 20,481.75, 28,264.35 and 11,407.05 is: 15,741.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.75 : 28,264.35 = 11,407.05 : x
  2. Step 2: Convert to fraction form
    20,481.75/28,264.35 = 11,407.05/x
  3. Step 3: Cross multiply
    20,481.75x = 28,264.35 × 11,407.05
  4. Step 4: Simplify right side
    20,481.75x = 322,412,853.67
  5. Step 5: Solve for x
    x = 322,412,853.67/20,481.75
  6. Step 6: Final answer
    x = 15,741.47

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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.