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Finding the Fourth Proportional to 40,908.66, 61,363.75 and 12,828.09

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Solution

The fourth proportional to 40,908.66, 61,363.75 and 12,828.09 is: 19,242.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,908.66 : 61,363.75 = 12,828.09 : x
  2. Step 2: Convert to fraction form
    40,908.66/61,363.75 = 12,828.09/x
  3. Step 3: Cross multiply
    40,908.66x = 61,363.75 × 12,828.09
  4. Step 4: Simplify right side
    40,908.66x = 787,179,707.74
  5. Step 5: Solve for x
    x = 787,179,707.74/40,908.66
  6. Step 6: Final answer
    x = 19,242.37

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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.