Home / 13,239.91-18,271.39-7,271.71

Finding the Fourth Proportional to 13,239.91, 18,271.39 and 7,271.71

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Solution

The fourth proportional to 13,239.91, 18,271.39 and 7,271.71 is: 10,035.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.91 : 18,271.39 = 7,271.71 : x
  2. Step 2: Convert to fraction form
    13,239.91/18,271.39 = 7,271.71/x
  3. Step 3: Cross multiply
    13,239.91x = 18,271.39 × 7,271.71
  4. Step 4: Simplify right side
    13,239.91x = 132,864,249.38
  5. Step 5: Solve for x
    x = 132,864,249.38/13,239.91
  6. Step 6: Final answer
    x = 10,035.13

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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.