Home / 13,147.40-18,129.59-8,665.41

Finding the Fourth Proportional to 13,147.40, 18,129.59 and 8,665.41

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Solution

The fourth proportional to 13,147.40, 18,129.59 and 8,665.41 is: 11,949.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.40 : 18,129.59 = 8,665.41 : x
  2. Step 2: Convert to fraction form
    13,147.40/18,129.59 = 8,665.41/x
  3. Step 3: Cross multiply
    13,147.40x = 18,129.59 × 8,665.41
  4. Step 4: Simplify right side
    13,147.40x = 157,100,251.66
  5. Step 5: Solve for x
    x = 157,100,251.66/13,147.40
  6. Step 6: Final answer
    x = 11,949.15

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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.