Home / 28,687.20-39,584.88-15,940.32

Finding the Fourth Proportional to 28,687.20, 39,584.88 and 15,940.32

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Solution

The fourth proportional to 28,687.20, 39,584.88 and 15,940.32 is: 21,995.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.20 : 39,584.88 = 15,940.32 : x
  2. Step 2: Convert to fraction form
    28,687.20/39,584.88 = 15,940.32/x
  3. Step 3: Cross multiply
    28,687.20x = 39,584.88 × 15,940.32
  4. Step 4: Simplify right side
    28,687.20x = 630,995,654.36
  5. Step 5: Solve for x
    x = 630,995,654.36/28,687.20
  6. Step 6: Final answer
    x = 21,995.72

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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.