Home / 7,881.40-11,819.67-2,686.06

Finding the Fourth Proportional to 7,881.40, 11,819.67 and 2,686.06

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Solution

The fourth proportional to 7,881.40, 11,819.67 and 2,686.06 is: 4,028.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.40 : 11,819.67 = 2,686.06 : x
  2. Step 2: Convert to fraction form
    7,881.40/11,819.67 = 2,686.06/x
  3. Step 3: Cross multiply
    7,881.40x = 11,819.67 × 2,686.06
  4. Step 4: Simplify right side
    7,881.40x = 31,748,342.80
  5. Step 5: Solve for x
    x = 31,748,342.80/7,881.40
  6. Step 6: Final answer
    x = 4,028.26

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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.