Home / 13,640.52-20,445.42-6,719.88

Finding the Fourth Proportional to 13,640.52, 20,445.42 and 6,719.88

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Solution

The fourth proportional to 13,640.52, 20,445.42 and 6,719.88 is: 10,072.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.52 : 20,445.42 = 6,719.88 : x
  2. Step 2: Convert to fraction form
    13,640.52/20,445.42 = 6,719.88/x
  3. Step 3: Cross multiply
    13,640.52x = 20,445.42 × 6,719.88
  4. Step 4: Simplify right side
    13,640.52x = 137,390,768.95
  5. Step 5: Solve for x
    x = 137,390,768.95/13,640.52
  6. Step 6: Final answer
    x = 10,072.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.