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Finding the Fourth Proportional to 8,921.03, 13,384.65 and 3,991.19

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Solution

The fourth proportional to 8,921.03, 13,384.65 and 3,991.19 is: 5,988.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.03 : 13,384.65 = 3,991.19 : x
  2. Step 2: Convert to fraction form
    8,921.03/13,384.65 = 3,991.19/x
  3. Step 3: Cross multiply
    8,921.03x = 13,384.65 × 3,991.19
  4. Step 4: Simplify right side
    8,921.03x = 53,420,681.23
  5. Step 5: Solve for x
    x = 53,420,681.23/8,921.03
  6. Step 6: Final answer
    x = 5,988.17

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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.