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Finding the Fourth Proportional to 10,402.88, 15,603.17 and 2,611.71

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Solution

The fourth proportional to 10,402.88, 15,603.17 and 2,611.71 is: 3,917.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,402.88 : 15,603.17 = 2,611.71 : x
  2. Step 2: Convert to fraction form
    10,402.88/15,603.17 = 2,611.71/x
  3. Step 3: Cross multiply
    10,402.88x = 15,603.17 × 2,611.71
  4. Step 4: Simplify right side
    10,402.88x = 40,750,942.06
  5. Step 5: Solve for x
    x = 40,750,942.06/10,402.88
  6. Step 6: Final answer
    x = 3,917.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.