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Finding the Fourth Proportional to 12,979.16, 17,901.05 and 9,394.65

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Solution

The fourth proportional to 12,979.16, 17,901.05 and 9,394.65 is: 12,957.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.16 : 17,901.05 = 9,394.65 : x
  2. Step 2: Convert to fraction form
    12,979.16/17,901.05 = 9,394.65/x
  3. Step 3: Cross multiply
    12,979.16x = 17,901.05 × 9,394.65
  4. Step 4: Simplify right side
    12,979.16x = 168,174,029.73
  5. Step 5: Solve for x
    x = 168,174,029.73/12,979.16
  6. Step 6: Final answer
    x = 12,957.23

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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.