Home / 28,581.20-39,432.90-18,517.40

Finding the Fourth Proportional to 28,581.20, 39,432.90 and 18,517.40

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Solution

The fourth proportional to 28,581.20, 39,432.90 and 18,517.40 is: 25,548.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,581.20 : 39,432.90 = 18,517.40 : x
  2. Step 2: Convert to fraction form
    28,581.20/39,432.90 = 18,517.40/x
  3. Step 3: Cross multiply
    28,581.20x = 39,432.90 × 18,517.40
  4. Step 4: Simplify right side
    28,581.20x = 730,194,782.46
  5. Step 5: Solve for x
    x = 730,194,782.46/28,581.20
  6. Step 6: Final answer
    x = 25,548.08

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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.