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Finding the Fourth Proportional to 9,919.12, 13,687.68 and 7,277.68

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Solution

The fourth proportional to 9,919.12, 13,687.68 and 7,277.68 is: 10,042.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.12 : 13,687.68 = 7,277.68 : x
  2. Step 2: Convert to fraction form
    9,919.12/13,687.68 = 7,277.68/x
  3. Step 3: Cross multiply
    9,919.12x = 13,687.68 × 7,277.68
  4. Step 4: Simplify right side
    9,919.12x = 99,614,554.98
  5. Step 5: Solve for x
    x = 99,614,554.98/9,919.12
  6. Step 6: Final answer
    x = 10,042.68

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1.5x scale

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.