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Finding the Fourth Proportional to 9,338, 12,886.44 and 5,612

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Solution

The fourth proportional to 9,338, 12,886.44 and 5,612 is: 7,744.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,338 : 12,886.44 = 5,612 : x
  2. Step 2: Convert to fraction form
    9,338/12,886.44 = 5,612/x
  3. Step 3: Cross multiply
    9,338x = 12,886.44 × 5,612
  4. Step 4: Simplify right side
    9,338x = 72,318,701.28
  5. Step 5: Solve for x
    x = 72,318,701.28/9,338
  6. Step 6: Final answer
    x = 7,744.56

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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.