Home / 7,921.51-11,881.65-2,077.97

Finding the Fourth Proportional to 7,921.51, 11,881.65 and 2,077.97

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Solution

The fourth proportional to 7,921.51, 11,881.65 and 2,077.97 is: 3,116.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.51 : 11,881.65 = 2,077.97 : x
  2. Step 2: Convert to fraction form
    7,921.51/11,881.65 = 2,077.97/x
  3. Step 3: Cross multiply
    7,921.51x = 11,881.65 × 2,077.97
  4. Step 4: Simplify right side
    7,921.51x = 24,689,712.25
  5. Step 5: Solve for x
    x = 24,689,712.25/7,921.51
  6. Step 6: Final answer
    x = 3,116.79

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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.