Home / 19,142.31-26,418.47-11,187.21

Finding the Fourth Proportional to 19,142.31, 26,418.47 and 11,187.21

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Solution

The fourth proportional to 19,142.31, 26,418.47 and 11,187.21 is: 15,439.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,142.31 : 26,418.47 = 11,187.21 : x
  2. Step 2: Convert to fraction form
    19,142.31/26,418.47 = 11,187.21/x
  3. Step 3: Cross multiply
    19,142.31x = 26,418.47 × 11,187.21
  4. Step 4: Simplify right side
    19,142.31x = 295,548,915.83
  5. Step 5: Solve for x
    x = 295,548,915.83/19,142.31
  6. Step 6: Final answer
    x = 15,439.56

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1.5x scale

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.