Home / 12,288.78-18,415.62-5,259.06

Finding the Fourth Proportional to 12,288.78, 18,415.62 and 5,259.06

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Solution

The fourth proportional to 12,288.78, 18,415.62 and 5,259.06 is: 7,881.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.78 : 18,415.62 = 5,259.06 : x
  2. Step 2: Convert to fraction form
    12,288.78/18,415.62 = 5,259.06/x
  3. Step 3: Cross multiply
    12,288.78x = 18,415.62 × 5,259.06
  4. Step 4: Simplify right side
    12,288.78x = 96,848,850.52
  5. Step 5: Solve for x
    x = 96,848,850.52/12,288.78
  6. Step 6: Final answer
    x = 7,881.08

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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.