Home / 20,125.90-27,774.45-11,173.57

Finding the Fourth Proportional to 20,125.90, 27,774.45 and 11,173.57

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Solution

The fourth proportional to 20,125.90, 27,774.45 and 11,173.57 is: 15,419.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.90 : 27,774.45 = 11,173.57 : x
  2. Step 2: Convert to fraction form
    20,125.90/27,774.45 = 11,173.57/x
  3. Step 3: Cross multiply
    20,125.90x = 27,774.45 × 11,173.57
  4. Step 4: Simplify right side
    20,125.90x = 310,339,761.29
  5. Step 5: Solve for x
    x = 310,339,761.29/20,125.90
  6. Step 6: Final answer
    x = 15,419.92

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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.