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Finding the Fourth Proportional to 8,639.65, 12,955.16 and 3,371.51

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Solution

The fourth proportional to 8,639.65, 12,955.16 and 3,371.51 is: 5,055.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.65 : 12,955.16 = 3,371.51 : x
  2. Step 2: Convert to fraction form
    8,639.65/12,955.16 = 3,371.51/x
  3. Step 3: Cross multiply
    8,639.65x = 12,955.16 × 3,371.51
  4. Step 4: Simplify right side
    8,639.65x = 43,678,451.49
  5. Step 5: Solve for x
    x = 43,678,451.49/8,639.65
  6. Step 6: Final answer
    x = 5,055.58

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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.