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Finding the Fourth Proportional to 12,964.30, 17,890.80 and 7,375.30

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Solution

The fourth proportional to 12,964.30, 17,890.80 and 7,375.30 is: 10,177.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,964.30 : 17,890.80 = 7,375.30 : x
  2. Step 2: Convert to fraction form
    12,964.30/17,890.80 = 7,375.30/x
  3. Step 3: Cross multiply
    12,964.30x = 17,890.80 × 7,375.30
  4. Step 4: Simplify right side
    12,964.30x = 131,950,017.24
  5. Step 5: Solve for x
    x = 131,950,017.24/12,964.30
  6. Step 6: Final answer
    x = 10,177.95

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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.