Home / 12,418.52-17,135.15-7,938.81

Finding the Fourth Proportional to 12,418.52, 17,135.15 and 7,938.81

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Solution

The fourth proportional to 12,418.52, 17,135.15 and 7,938.81 is: 10,954.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.52 : 17,135.15 = 7,938.81 : x
  2. Step 2: Convert to fraction form
    12,418.52/17,135.15 = 7,938.81/x
  3. Step 3: Cross multiply
    12,418.52x = 17,135.15 × 7,938.81
  4. Step 4: Simplify right side
    12,418.52x = 136,032,660.48
  5. Step 5: Solve for x
    x = 136,032,660.48/12,418.52
  6. Step 6: Final answer
    x = 10,954.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.