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Finding the Fourth Proportional to 18,978.78, 26,190.72 and 10,595.28

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Solution

The fourth proportional to 18,978.78, 26,190.72 and 10,595.28 is: 14,621.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.78 : 26,190.72 = 10,595.28 : x
  2. Step 2: Convert to fraction form
    18,978.78/26,190.72 = 10,595.28/x
  3. Step 3: Cross multiply
    18,978.78x = 26,190.72 × 10,595.28
  4. Step 4: Simplify right side
    18,978.78x = 277,498,011.80
  5. Step 5: Solve for x
    x = 277,498,011.80/18,978.78
  6. Step 6: Final answer
    x = 14,621.49

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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.