Home / 21,114.61-29,016.18-20,138.85

Finding the Fourth Proportional to 21,114.61, 29,016.18 and 20,138.85

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Solution

The fourth proportional to 21,114.61, 29,016.18 and 20,138.85 is: 27,675.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.61 : 29,016.18 = 20,138.85 : x
  2. Step 2: Convert to fraction form
    21,114.61/29,016.18 = 20,138.85/x
  3. Step 3: Cross multiply
    21,114.61x = 29,016.18 × 20,138.85
  4. Step 4: Simplify right side
    21,114.61x = 584,352,496.59
  5. Step 5: Solve for x
    x = 584,352,496.59/21,114.61
  6. Step 6: Final answer
    x = 27,675.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.