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Finding the Fourth Proportional to 8,486.88, 12,726.21 and 4,978.04

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Solution

The fourth proportional to 8,486.88, 12,726.21 and 4,978.04 is: 7,464.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.88 : 12,726.21 = 4,978.04 : x
  2. Step 2: Convert to fraction form
    8,486.88/12,726.21 = 4,978.04/x
  3. Step 3: Cross multiply
    8,486.88x = 12,726.21 × 4,978.04
  4. Step 4: Simplify right side
    8,486.88x = 63,351,518.80
  5. Step 5: Solve for x
    x = 63,351,518.80/8,486.88
  6. Step 6: Final answer
    x = 7,464.64

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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.