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Finding the Fourth Proportional to 26,612.60, 39,921.12 and 6,891.53

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Solution

The fourth proportional to 26,612.60, 39,921.12 and 6,891.53 is: 10,337.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,612.60 : 39,921.12 = 6,891.53 : x
  2. Step 2: Convert to fraction form
    26,612.60/39,921.12 = 6,891.53/x
  3. Step 3: Cross multiply
    26,612.60x = 39,921.12 × 6,891.53
  4. Step 4: Simplify right side
    26,612.60x = 275,117,396.51
  5. Step 5: Solve for x
    x = 275,117,396.51/26,612.60
  6. Step 6: Final answer
    x = 10,337.86

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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.