Home / 12,919.36-17,831.40-7,616

Finding the Fourth Proportional to 12,919.36, 17,831.40 and 7,616

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Solution

The fourth proportional to 12,919.36, 17,831.40 and 7,616 is: 10,511.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.36 : 17,831.40 = 7,616 : x
  2. Step 2: Convert to fraction form
    12,919.36/17,831.40 = 7,616/x
  3. Step 3: Cross multiply
    12,919.36x = 17,831.40 × 7,616
  4. Step 4: Simplify right side
    12,919.36x = 135,803,942.40
  5. Step 5: Solve for x
    x = 135,803,942.40/12,919.36
  6. Step 6: Final answer
    x = 10,511.66

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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.