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Finding the Fourth Proportional to 8,939.82, 12,334.10 and 5,162.48

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Solution

The fourth proportional to 8,939.82, 12,334.10 and 5,162.48 is: 7,122.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.82 : 12,334.10 = 5,162.48 : x
  2. Step 2: Convert to fraction form
    8,939.82/12,334.10 = 5,162.48/x
  3. Step 3: Cross multiply
    8,939.82x = 12,334.10 × 5,162.48
  4. Step 4: Simplify right side
    8,939.82x = 63,674,587.24
  5. Step 5: Solve for x
    x = 63,674,587.24/8,939.82
  6. Step 6: Final answer
    x = 7,122.58

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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.