Home / 20,492.88-28,280.68-11,540.70

Finding the Fourth Proportional to 20,492.88, 28,280.68 and 11,540.70

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Solution

The fourth proportional to 20,492.88, 28,280.68 and 11,540.70 is: 15,926.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.88 : 28,280.68 = 11,540.70 : x
  2. Step 2: Convert to fraction form
    20,492.88/28,280.68 = 11,540.70/x
  3. Step 3: Cross multiply
    20,492.88x = 28,280.68 × 11,540.70
  4. Step 4: Simplify right side
    20,492.88x = 326,378,843.68
  5. Step 5: Solve for x
    x = 326,378,843.68/20,492.88
  6. Step 6: Final answer
    x = 15,926.45

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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.