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Finding the Fourth Proportional to 30,386.88, 41,934.24 and 17,138.88

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Solution

The fourth proportional to 30,386.88, 41,934.24 and 17,138.88 is: 23,651.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,386.88 : 41,934.24 = 17,138.88 : x
  2. Step 2: Convert to fraction form
    30,386.88/41,934.24 = 17,138.88/x
  3. Step 3: Cross multiply
    30,386.88x = 41,934.24 × 17,138.88
  4. Step 4: Simplify right side
    30,386.88x = 718,705,907.25
  5. Step 5: Solve for x
    x = 718,705,907.25/30,386.88
  6. Step 6: Final answer
    x = 23,651.85

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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.