Home / 7,345.20-10,128.92-6,286.49

Finding the Fourth Proportional to 7,345.20, 10,128.92 and 6,286.49

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Solution

The fourth proportional to 7,345.20, 10,128.92 and 6,286.49 is: 8,668.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,345.20 : 10,128.92 = 6,286.49 : x
  2. Step 2: Convert to fraction form
    7,345.20/10,128.92 = 6,286.49/x
  3. Step 3: Cross multiply
    7,345.20x = 10,128.92 × 6,286.49
  4. Step 4: Simplify right side
    7,345.20x = 63,675,272.21
  5. Step 5: Solve for x
    x = 63,675,272.21/7,345.20
  6. Step 6: Final answer
    x = 8,668.96

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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.