Home / 10,640.31-15,970.19-8,167.11

Finding the Fourth Proportional to 10,640.31, 15,970.19 and 8,167.11

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Solution

The fourth proportional to 10,640.31, 15,970.19 and 8,167.11 is: 12,258.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.31 : 15,970.19 = 8,167.11 : x
  2. Step 2: Convert to fraction form
    10,640.31/15,970.19 = 8,167.11/x
  3. Step 3: Cross multiply
    10,640.31x = 15,970.19 × 8,167.11
  4. Step 4: Simplify right side
    10,640.31x = 130,430,257.62
  5. Step 5: Solve for x
    x = 130,430,257.62/10,640.31
  6. Step 6: Final answer
    x = 12,258.13

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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.