Home / 13,239.71-18,270.92-7,271.49

Finding the Fourth Proportional to 13,239.71, 18,270.92 and 7,271.49

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Solution

The fourth proportional to 13,239.71, 18,270.92 and 7,271.49 is: 10,034.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.71 : 18,270.92 = 7,271.49 : x
  2. Step 2: Convert to fraction form
    13,239.71/18,270.92 = 7,271.49/x
  3. Step 3: Cross multiply
    13,239.71x = 18,270.92 × 7,271.49
  4. Step 4: Simplify right side
    13,239.71x = 132,856,775.71
  5. Step 5: Solve for x
    x = 132,856,775.71/13,239.71
  6. Step 6: Final answer
    x = 10,034.72

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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.