Home / 13,211.08-18,231.18-7,243.12

Finding the Fourth Proportional to 13,211.08, 18,231.18 and 7,243.12

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Solution

The fourth proportional to 13,211.08, 18,231.18 and 7,243.12 is: 9,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.08 : 18,231.18 = 7,243.12 : x
  2. Step 2: Convert to fraction form
    13,211.08/18,231.18 = 7,243.12/x
  3. Step 3: Cross multiply
    13,211.08x = 18,231.18 × 7,243.12
  4. Step 4: Simplify right side
    13,211.08x = 132,050,624.48
  5. Step 5: Solve for x
    x = 132,050,624.48/13,211.08
  6. Step 6: Final answer
    x = 9,995.45

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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.