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Finding the Fourth Proportional to 13,259.88, 18,306 and 7,956

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Solution

The fourth proportional to 13,259.88, 18,306 and 7,956 is: 10,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,259.88 : 18,306 = 7,956 : x
  2. Step 2: Convert to fraction form
    13,259.88/18,306 = 7,956/x
  3. Step 3: Cross multiply
    13,259.88x = 18,306 × 7,956
  4. Step 4: Simplify right side
    13,259.88x = 145,642,536
  5. Step 5: Solve for x
    x = 145,642,536/13,259.88
  6. Step 6: Final answer
    x = 10,983.70

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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.