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Finding the Fourth Proportional to 12,639.78, 18,948.06 and 4,847.04

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Solution

The fourth proportional to 12,639.78, 18,948.06 and 4,847.04 is: 7,266.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.78 : 18,948.06 = 4,847.04 : x
  2. Step 2: Convert to fraction form
    12,639.78/18,948.06 = 4,847.04/x
  3. Step 3: Cross multiply
    12,639.78x = 18,948.06 × 4,847.04
  4. Step 4: Simplify right side
    12,639.78x = 91,842,004.74
  5. Step 5: Solve for x
    x = 91,842,004.74/12,639.78
  6. Step 6: Final answer
    x = 7,266.11

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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.