Home / 28,555.80-39,408.29-15,980.55

Finding the Fourth Proportional to 28,555.80, 39,408.29 and 15,980.55

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Solution

The fourth proportional to 28,555.80, 39,408.29 and 15,980.55 is: 22,053.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.80 : 39,408.29 = 15,980.55 : x
  2. Step 2: Convert to fraction form
    28,555.80/39,408.29 = 15,980.55/x
  3. Step 3: Cross multiply
    28,555.80x = 39,408.29 × 15,980.55
  4. Step 4: Simplify right side
    28,555.80x = 629,766,148.76
  5. Step 5: Solve for x
    x = 629,766,148.76/28,555.80
  6. Step 6: Final answer
    x = 22,053.88

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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.