Home / 20,531.34-28,333.13-11,099.88

Finding the Fourth Proportional to 20,531.34, 28,333.13 and 11,099.88

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Solution

The fourth proportional to 20,531.34, 28,333.13 and 11,099.88 is: 15,317.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.34 : 28,333.13 = 11,099.88 : x
  2. Step 2: Convert to fraction form
    20,531.34/28,333.13 = 11,099.88/x
  3. Step 3: Cross multiply
    20,531.34x = 28,333.13 × 11,099.88
  4. Step 4: Simplify right side
    20,531.34x = 314,494,287.53
  5. Step 5: Solve for x
    x = 314,494,287.53/20,531.34
  6. Step 6: Final answer
    x = 15,317.77

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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.