Home / 8,664.40-11,959.14-5,128.66

Finding the Fourth Proportional to 8,664.40, 11,959.14 and 5,128.66

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Solution

The fourth proportional to 8,664.40, 11,959.14 and 5,128.66 is: 7,078.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.40 : 11,959.14 = 5,128.66 : x
  2. Step 2: Convert to fraction form
    8,664.40/11,959.14 = 5,128.66/x
  3. Step 3: Cross multiply
    8,664.40x = 11,959.14 × 5,128.66
  4. Step 4: Simplify right side
    8,664.40x = 61,334,362.95
  5. Step 5: Solve for x
    x = 61,334,362.95/8,664.40
  6. Step 6: Final answer
    x = 7,078.89

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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.