Home / 12,219.36-18,319.32-5,289

Finding the Fourth Proportional to 12,219.36, 18,319.32 and 5,289

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Solution

The fourth proportional to 12,219.36, 18,319.32 and 5,289 is: 7,929.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.36 : 18,319.32 = 5,289 : x
  2. Step 2: Convert to fraction form
    12,219.36/18,319.32 = 5,289/x
  3. Step 3: Cross multiply
    12,219.36x = 18,319.32 × 5,289
  4. Step 4: Simplify right side
    12,219.36x = 96,890,883.48
  5. Step 5: Solve for x
    x = 96,890,883.48/12,219.36
  6. Step 6: Final answer
    x = 7,929.29

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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.