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Finding the Fourth Proportional to 17,978.55, 26,976.18 and 6,881.58

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Solution

The fourth proportional to 17,978.55, 26,976.18 and 6,881.58 is: 10,325.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,978.55 : 26,976.18 = 6,881.58 : x
  2. Step 2: Convert to fraction form
    17,978.55/26,976.18 = 6,881.58/x
  3. Step 3: Cross multiply
    17,978.55x = 26,976.18 × 6,881.58
  4. Step 4: Simplify right side
    17,978.55x = 185,638,740.76
  5. Step 5: Solve for x
    x = 185,638,740.76/17,978.55
  6. Step 6: Final answer
    x = 10,325.57

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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.