Home / 20,778.98-28,665-15,104.93

Finding the Fourth Proportional to 20,778.98, 28,665 and 15,104.93

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Solution

The fourth proportional to 20,778.98, 28,665 and 15,104.93 is: 20,837.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.98 : 28,665 = 15,104.93 : x
  2. Step 2: Convert to fraction form
    20,778.98/28,665 = 15,104.93/x
  3. Step 3: Cross multiply
    20,778.98x = 28,665 × 15,104.93
  4. Step 4: Simplify right side
    20,778.98x = 432,982,675.13
  5. Step 5: Solve for x
    x = 432,982,675.13/20,778.98
  6. Step 6: Final answer
    x = 20,837.54

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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.