Home / 13,106.18-18,086.85-7,138.17

Finding the Fourth Proportional to 13,106.18, 18,086.85 and 7,138.17

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Solution

The fourth proportional to 13,106.18, 18,086.85 and 7,138.17 is: 9,850.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.18 : 18,086.85 = 7,138.17 : x
  2. Step 2: Convert to fraction form
    13,106.18/18,086.85 = 7,138.17/x
  3. Step 3: Cross multiply
    13,106.18x = 18,086.85 × 7,138.17
  4. Step 4: Simplify right side
    13,106.18x = 129,107,010.06
  5. Step 5: Solve for x
    x = 129,107,010.06/13,106.18
  6. Step 6: Final answer
    x = 9,850.85

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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.