Home / 20,481.87-28,264.53-11,407.17

Finding the Fourth Proportional to 20,481.87, 28,264.53 and 11,407.17

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Solution

The fourth proportional to 20,481.87, 28,264.53 and 11,407.17 is: 15,741.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.87 : 28,264.53 = 11,407.17 : x
  2. Step 2: Convert to fraction form
    20,481.87/28,264.53 = 11,407.17/x
  3. Step 3: Cross multiply
    20,481.87x = 28,264.53 × 11,407.17
  4. Step 4: Simplify right side
    20,481.87x = 322,418,241.64
  5. Step 5: Solve for x
    x = 322,418,241.64/20,481.87
  6. Step 6: Final answer
    x = 15,741.64

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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.