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Finding the Fourth Proportional to 12,399.51, 17,107.04 and 7,925.88

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Solution

The fourth proportional to 12,399.51, 17,107.04 and 7,925.88 is: 10,934.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.51 : 17,107.04 = 7,925.88 : x
  2. Step 2: Convert to fraction form
    12,399.51/17,107.04 = 7,925.88/x
  3. Step 3: Cross multiply
    12,399.51x = 17,107.04 × 7,925.88
  4. Step 4: Simplify right side
    12,399.51x = 135,588,306.57
  5. Step 5: Solve for x
    x = 135,588,306.57/12,399.51
  6. Step 6: Final answer
    x = 10,934.97

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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.