Home / 28,512.87-39,347.20-15,766.50

Finding the Fourth Proportional to 28,512.87, 39,347.20 and 15,766.50

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Solution

The fourth proportional to 28,512.87, 39,347.20 and 15,766.50 is: 21,757.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.87 : 39,347.20 = 15,766.50 : x
  2. Step 2: Convert to fraction form
    28,512.87/39,347.20 = 15,766.50/x
  3. Step 3: Cross multiply
    28,512.87x = 39,347.20 × 15,766.50
  4. Step 4: Simplify right side
    28,512.87x = 620,367,628.80
  5. Step 5: Solve for x
    x = 620,367,628.80/28,512.87
  6. Step 6: Final answer
    x = 21,757.46

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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.