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Finding the Fourth Proportional to 9,871.03, 13,621.99 and 5,394.81

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Solution

The fourth proportional to 9,871.03, 13,621.99 and 5,394.81 is: 7,444.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.03 : 13,621.99 = 5,394.81 : x
  2. Step 2: Convert to fraction form
    9,871.03/13,621.99 = 5,394.81/x
  3. Step 3: Cross multiply
    9,871.03x = 13,621.99 × 5,394.81
  4. Step 4: Simplify right side
    9,871.03x = 73,488,047.87
  5. Step 5: Solve for x
    x = 73,488,047.87/9,871.03
  6. Step 6: Final answer
    x = 7,444.82

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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.