Home / 7,921.16-11,878.54-2,988.11

Finding the Fourth Proportional to 7,921.16, 11,878.54 and 2,988.11

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Solution

The fourth proportional to 7,921.16, 11,878.54 and 2,988.11 is: 4,480.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.16 : 11,878.54 = 2,988.11 : x
  2. Step 2: Convert to fraction form
    7,921.16/11,878.54 = 2,988.11/x
  3. Step 3: Cross multiply
    7,921.16x = 11,878.54 × 2,988.11
  4. Step 4: Simplify right side
    7,921.16x = 35,494,309.83
  5. Step 5: Solve for x
    x = 35,494,309.83/7,921.16
  6. Step 6: Final answer
    x = 4,480.95

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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.