Home / 7,954.38-11,931.80-2,111.00

Finding the Fourth Proportional to 7,954.38, 11,931.80 and 2,111.00

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Solution

The fourth proportional to 7,954.38, 11,931.80 and 2,111.00 is: 3,166.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,954.38 : 11,931.80 = 2,111.00 : x
  2. Step 2: Convert to fraction form
    7,954.38/11,931.80 = 2,111.00/x
  3. Step 3: Cross multiply
    7,954.38x = 11,931.80 × 2,111.00
  4. Step 4: Simplify right side
    7,954.38x = 25,187,959.59
  5. Step 5: Solve for x
    x = 25,187,959.59/7,954.38
  6. Step 6: Final answer
    x = 3,166.55

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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.