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Finding the Fourth Proportional to 28,649.88, 42,968.88 and 7,868.52

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Solution

The fourth proportional to 28,649.88, 42,968.88 and 7,868.52 is: 11,801.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.88 : 42,968.88 = 7,868.52 : x
  2. Step 2: Convert to fraction form
    28,649.88/42,968.88 = 7,868.52/x
  3. Step 3: Cross multiply
    28,649.88x = 42,968.88 × 7,868.52
  4. Step 4: Simplify right side
    28,649.88x = 338,101,491.66
  5. Step 5: Solve for x
    x = 338,101,491.66/28,649.88
  6. Step 6: Final answer
    x = 11,801.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.