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Finding the Fourth Proportional to 26,724, 36,879 and 15,389.36

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Solution

The fourth proportional to 26,724, 36,879 and 15,389.36 is: 21,237.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,724 : 36,879 = 15,389.36 : x
  2. Step 2: Convert to fraction form
    26,724/36,879 = 15,389.36/x
  3. Step 3: Cross multiply
    26,724x = 36,879 × 15,389.36
  4. Step 4: Simplify right side
    26,724x = 567,544,207.44
  5. Step 5: Solve for x
    x = 567,544,207.44/26,724
  6. Step 6: Final answer
    x = 21,237.25

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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.