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Finding the Fourth Proportional to 8,979.92, 12,394.30 and 5,830.64

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Solution

The fourth proportional to 8,979.92, 12,394.30 and 5,830.64 is: 8,047.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.92 : 12,394.30 = 5,830.64 : x
  2. Step 2: Convert to fraction form
    8,979.92/12,394.30 = 5,830.64/x
  3. Step 3: Cross multiply
    8,979.92x = 12,394.30 × 5,830.64
  4. Step 4: Simplify right side
    8,979.92x = 72,266,624.80
  5. Step 5: Solve for x
    x = 72,266,624.80/8,979.92
  6. Step 6: Final answer
    x = 8,047.58

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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.