Home / 28,319.75-39,081.30-15,744.50

Finding the Fourth Proportional to 28,319.75, 39,081.30 and 15,744.50

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Solution

The fourth proportional to 28,319.75, 39,081.30 and 15,744.50 is: 21,727.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.75 : 39,081.30 = 15,744.50 : x
  2. Step 2: Convert to fraction form
    28,319.75/39,081.30 = 15,744.50/x
  3. Step 3: Cross multiply
    28,319.75x = 39,081.30 × 15,744.50
  4. Step 4: Simplify right side
    28,319.75x = 615,315,527.85
  5. Step 5: Solve for x
    x = 615,315,527.85/28,319.75
  6. Step 6: Final answer
    x = 21,727.44

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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.