Home / 13,110.39-18,092.84-7,142.72

Finding the Fourth Proportional to 13,110.39, 18,092.84 and 7,142.72

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Solution

The fourth proportional to 13,110.39, 18,092.84 and 7,142.72 is: 9,857.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.39 : 18,092.84 = 7,142.72 : x
  2. Step 2: Convert to fraction form
    13,110.39/18,092.84 = 7,142.72/x
  3. Step 3: Cross multiply
    13,110.39x = 18,092.84 × 7,142.72
  4. Step 4: Simplify right side
    13,110.39x = 129,231,963.95
  5. Step 5: Solve for x
    x = 129,231,963.95/13,110.39
  6. Step 6: Final answer
    x = 9,857.22

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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.