Home / 20,531.20-28,333.04-11,099.68

Finding the Fourth Proportional to 20,531.20, 28,333.04 and 11,099.68

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Solution

The fourth proportional to 20,531.20, 28,333.04 and 11,099.68 is: 15,317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.20 : 28,333.04 = 11,099.68 : x
  2. Step 2: Convert to fraction form
    20,531.20/28,333.04 = 11,099.68/x
  3. Step 3: Cross multiply
    20,531.20x = 28,333.04 × 11,099.68
  4. Step 4: Simplify right side
    20,531.20x = 314,487,677.43
  5. Step 5: Solve for x
    x = 314,487,677.43/20,531.20
  6. Step 6: Final answer
    x = 15,317.55

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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.