Home / 28,255.50-38,993.81-15,680.25

Finding the Fourth Proportional to 28,255.50, 38,993.81 and 15,680.25

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Solution

The fourth proportional to 28,255.50, 38,993.81 and 15,680.25 is: 21,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.50 : 38,993.81 = 15,680.25 : x
  2. Step 2: Convert to fraction form
    28,255.50/38,993.81 = 15,680.25/x
  3. Step 3: Cross multiply
    28,255.50x = 38,993.81 × 15,680.25
  4. Step 4: Simplify right side
    28,255.50x = 611,432,610.85
  5. Step 5: Solve for x
    x = 611,432,610.85/28,255.50
  6. Step 6: Final answer
    x = 21,639.42

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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.