Home / 20,531.25-28,333.13-11,099.81

Finding the Fourth Proportional to 20,531.25, 28,333.13 and 11,099.81

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Solution

The fourth proportional to 20,531.25, 28,333.13 and 11,099.81 is: 15,317.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.25 : 28,333.13 = 11,099.81 : x
  2. Step 2: Convert to fraction form
    20,531.25/28,333.13 = 11,099.81/x
  3. Step 3: Cross multiply
    20,531.25x = 28,333.13 × 11,099.81
  4. Step 4: Simplify right side
    20,531.25x = 314,492,375.04
  5. Step 5: Solve for x
    x = 314,492,375.04/20,531.25
  6. Step 6: Final answer
    x = 15,317.74

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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.