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Finding the Fourth Proportional to 9,418.80, 12,984.06 and 7,176.79

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Solution

The fourth proportional to 9,418.80, 12,984.06 and 7,176.79 is: 9,893.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,418.80 : 12,984.06 = 7,176.79 : x
  2. Step 2: Convert to fraction form
    9,418.80/12,984.06 = 7,176.79/x
  3. Step 3: Cross multiply
    9,418.80x = 12,984.06 × 7,176.79
  4. Step 4: Simplify right side
    9,418.80x = 93,183,842.08
  5. Step 5: Solve for x
    x = 93,183,842.08/9,418.80
  6. Step 6: Final answer
    x = 9,893.39

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Similar ratio
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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.