Home / 13,078.29-18,048.16-7,109.97

Finding the Fourth Proportional to 13,078.29, 18,048.16 and 7,109.97

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Solution

The fourth proportional to 13,078.29, 18,048.16 and 7,109.97 is: 9,811.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.29 : 18,048.16 = 7,109.97 : x
  2. Step 2: Convert to fraction form
    13,078.29/18,048.16 = 7,109.97/x
  3. Step 3: Cross multiply
    13,078.29x = 18,048.16 × 7,109.97
  4. Step 4: Simplify right side
    13,078.29x = 128,321,876.16
  5. Step 5: Solve for x
    x = 128,321,876.16/13,078.29
  6. Step 6: Final answer
    x = 9,811.82

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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.