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Finding the Fourth Proportional to 18,759.78, 25,887.64 and 10,261.78

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Solution

The fourth proportional to 18,759.78, 25,887.64 and 10,261.78 is: 14,160.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.78 : 25,887.64 = 10,261.78 : x
  2. Step 2: Convert to fraction form
    18,759.78/25,887.64 = 10,261.78/x
  3. Step 3: Cross multiply
    18,759.78x = 25,887.64 × 10,261.78
  4. Step 4: Simplify right side
    18,759.78x = 265,653,266.40
  5. Step 5: Solve for x
    x = 265,653,266.40/18,759.78
  6. Step 6: Final answer
    x = 14,160.79

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1.5x scale

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.