Home / 20,168.72-27,833.28-11,215.89

Finding the Fourth Proportional to 20,168.72, 27,833.28 and 11,215.89

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Solution

The fourth proportional to 20,168.72, 27,833.28 and 11,215.89 is: 15,478.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.72 : 27,833.28 = 11,215.89 : x
  2. Step 2: Convert to fraction form
    20,168.72/27,833.28 = 11,215.89/x
  3. Step 3: Cross multiply
    20,168.72x = 27,833.28 × 11,215.89
  4. Step 4: Simplify right side
    20,168.72x = 312,175,006.82
  5. Step 5: Solve for x
    x = 312,175,006.82/20,168.72
  6. Step 6: Final answer
    x = 15,478.18

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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.