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Finding the Fourth Proportional to 12,956, 17,876.40 and 7,651.04

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Solution

The fourth proportional to 12,956, 17,876.40 and 7,651.04 is: 10,556.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956 : 17,876.40 = 7,651.04 : x
  2. Step 2: Convert to fraction form
    12,956/17,876.40 = 7,651.04/x
  3. Step 3: Cross multiply
    12,956x = 17,876.40 × 7,651.04
  4. Step 4: Simplify right side
    12,956x = 136,773,051.46
  5. Step 5: Solve for x
    x = 136,773,051.46/12,956
  6. Step 6: Final answer
    x = 10,556.73

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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.