Home / 13,100.97-18,078.77-7,132.66

Finding the Fourth Proportional to 13,100.97, 18,078.77 and 7,132.66

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Solution

The fourth proportional to 13,100.97, 18,078.77 and 7,132.66 is: 9,842.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,100.97 : 18,078.77 = 7,132.66 : x
  2. Step 2: Convert to fraction form
    13,100.97/18,078.77 = 7,132.66/x
  3. Step 3: Cross multiply
    13,100.97x = 18,078.77 × 7,132.66
  4. Step 4: Simplify right side
    13,100.97x = 128,949,719.63
  5. Step 5: Solve for x
    x = 128,949,719.63/13,100.97
  6. Step 6: Final answer
    x = 9,842.76

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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.