Home / 13,180.29-18,189.79-7,515.17

Finding the Fourth Proportional to 13,180.29, 18,189.79 and 7,515.17

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Solution

The fourth proportional to 13,180.29, 18,189.79 and 7,515.17 is: 10,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180.29 : 18,189.79 = 7,515.17 : x
  2. Step 2: Convert to fraction form
    13,180.29/18,189.79 = 7,515.17/x
  3. Step 3: Cross multiply
    13,180.29x = 18,189.79 × 7,515.17
  4. Step 4: Simplify right side
    13,180.29x = 136,699,390.80
  5. Step 5: Solve for x
    x = 136,699,390.80/13,180.29
  6. Step 6: Final answer
    x = 10,371.50

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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.