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Finding the Fourth Proportional to 12,956, 17,881.44 and 9,806.72

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Solution

The fourth proportional to 12,956, 17,881.44 and 9,806.72 is: 13,534.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956 : 17,881.44 = 9,806.72 : x
  2. Step 2: Convert to fraction form
    12,956/17,881.44 = 9,806.72/x
  3. Step 3: Cross multiply
    12,956x = 17,881.44 × 9,806.72
  4. Step 4: Simplify right side
    12,956x = 175,358,275.28
  5. Step 5: Solve for x
    x = 175,358,275.28/12,956
  6. Step 6: Final answer
    x = 13,534.91

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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.