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Finding the Fourth Proportional to 9,908.12, 14,869.28 and 3,905.12

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Solution

The fourth proportional to 9,908.12, 14,869.28 and 3,905.12 is: 5,860.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,908.12 : 14,869.28 = 3,905.12 : x
  2. Step 2: Convert to fraction form
    9,908.12/14,869.28 = 3,905.12/x
  3. Step 3: Cross multiply
    9,908.12x = 14,869.28 × 3,905.12
  4. Step 4: Simplify right side
    9,908.12x = 58,066,322.71
  5. Step 5: Solve for x
    x = 58,066,322.71/9,908.12
  6. Step 6: Final answer
    x = 5,860.48

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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.