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Finding the Fourth Proportional to 34,987.86, 48,279.75 and 19,672.78

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Solution

The fourth proportional to 34,987.86, 48,279.75 and 19,672.78 is: 27,146.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,987.86 : 48,279.75 = 19,672.78 : x
  2. Step 2: Convert to fraction form
    34,987.86/48,279.75 = 19,672.78/x
  3. Step 3: Cross multiply
    34,987.86x = 48,279.75 × 19,672.78
  4. Step 4: Simplify right side
    34,987.86x = 949,796,900.21
  5. Step 5: Solve for x
    x = 949,796,900.21/34,987.86
  6. Step 6: Final answer
    x = 27,146.47

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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.