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Finding the Fourth Proportional to 12,719.65, 17,554.92 and 7,055.66

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Solution

The fourth proportional to 12,719.65, 17,554.92 and 7,055.66 is: 9,737.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,719.65 : 17,554.92 = 7,055.66 : x
  2. Step 2: Convert to fraction form
    12,719.65/17,554.92 = 7,055.66/x
  3. Step 3: Cross multiply
    12,719.65x = 17,554.92 × 7,055.66
  4. Step 4: Simplify right side
    12,719.65x = 123,861,546.85
  5. Step 5: Solve for x
    x = 123,861,546.85/12,719.65
  6. Step 6: Final answer
    x = 9,737.81

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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.