Home / 19,915.25-30,005.82-18,017.79

Finding the Fourth Proportional to 19,915.25, 30,005.82 and 18,017.79

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Solution

The fourth proportional to 19,915.25, 30,005.82 and 18,017.79 is: 27,146.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.25 : 30,005.82 = 18,017.79 : x
  2. Step 2: Convert to fraction form
    19,915.25/30,005.82 = 18,017.79/x
  3. Step 3: Cross multiply
    19,915.25x = 30,005.82 × 18,017.79
  4. Step 4: Simplify right side
    19,915.25x = 540,638,563.54
  5. Step 5: Solve for x
    x = 540,638,563.54/19,915.25
  6. Step 6: Final answer
    x = 27,146.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.