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Finding the Fourth Proportional to 42,612.78, 63,919.13 and 11,448.03

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Solution

The fourth proportional to 42,612.78, 63,919.13 and 11,448.03 is: 17,172.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,612.78 : 63,919.13 = 11,448.03 : x
  2. Step 2: Convert to fraction form
    42,612.78/63,919.13 = 11,448.03/x
  3. Step 3: Cross multiply
    42,612.78x = 63,919.13 × 11,448.03
  4. Step 4: Simplify right side
    42,612.78x = 731,747,986.64
  5. Step 5: Solve for x
    x = 731,747,986.64/42,612.78
  6. Step 6: Final answer
    x = 17,172.03

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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.