Home / 13,211.29-18,231.71-7,243.08

Finding the Fourth Proportional to 13,211.29, 18,231.71 and 7,243.08

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Solution

The fourth proportional to 13,211.29, 18,231.71 and 7,243.08 is: 9,995.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.29 : 18,231.71 = 7,243.08 : x
  2. Step 2: Convert to fraction form
    13,211.29/18,231.71 = 7,243.08/x
  3. Step 3: Cross multiply
    13,211.29x = 18,231.71 × 7,243.08
  4. Step 4: Simplify right side
    13,211.29x = 132,053,734.07
  5. Step 5: Solve for x
    x = 132,053,734.07/13,211.29
  6. Step 6: Final answer
    x = 9,995.52

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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.