Home / 20,371.15-28,111.93-11,418.64

Finding the Fourth Proportional to 20,371.15, 28,111.93 and 11,418.64

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Solution

The fourth proportional to 20,371.15, 28,111.93 and 11,418.64 is: 15,757.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.15 : 28,111.93 = 11,418.64 : x
  2. Step 2: Convert to fraction form
    20,371.15/28,111.93 = 11,418.64/x
  3. Step 3: Cross multiply
    20,371.15x = 28,111.93 × 11,418.64
  4. Step 4: Simplify right side
    20,371.15x = 321,000,008.38
  5. Step 5: Solve for x
    x = 321,000,008.38/20,371.15
  6. Step 6: Final answer
    x = 15,757.58

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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.