Home / 28,486.15-39,311.29-15,739.62

Finding the Fourth Proportional to 28,486.15, 39,311.29 and 15,739.62

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Solution

The fourth proportional to 28,486.15, 39,311.29 and 15,739.62 is: 21,720.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.15 : 39,311.29 = 15,739.62 : x
  2. Step 2: Convert to fraction form
    28,486.15/39,311.29 = 15,739.62/x
  3. Step 3: Cross multiply
    28,486.15x = 39,311.29 × 15,739.62
  4. Step 4: Simplify right side
    28,486.15x = 618,744,766.31
  5. Step 5: Solve for x
    x = 618,744,766.31/28,486.15
  6. Step 6: Final answer
    x = 21,720.90

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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.