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Finding the Fourth Proportional to 8,939.54, 12,328.08 and 6,514.71

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Solution

The fourth proportional to 8,939.54, 12,328.08 and 6,514.71 is: 8,984.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.54 : 12,328.08 = 6,514.71 : x
  2. Step 2: Convert to fraction form
    8,939.54/12,328.08 = 6,514.71/x
  3. Step 3: Cross multiply
    8,939.54x = 12,328.08 × 6,514.71
  4. Step 4: Simplify right side
    8,939.54x = 80,313,866.06
  5. Step 5: Solve for x
    x = 80,313,866.06/8,939.54
  6. Step 6: Final answer
    x = 8,984.11

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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.