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Finding the Fourth Proportional to 9,103, 13,656.66 and 2,947

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Solution

The fourth proportional to 9,103, 13,656.66 and 2,947 is: 4,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,103 : 13,656.66 = 2,947 : x
  2. Step 2: Convert to fraction form
    9,103/13,656.66 = 2,947/x
  3. Step 3: Cross multiply
    9,103x = 13,656.66 × 2,947
  4. Step 4: Simplify right side
    9,103x = 40,246,177.02
  5. Step 5: Solve for x
    x = 40,246,177.02/9,103
  6. Step 6: Final answer
    x = 4,421.20

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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.