Home / 3,956.51-5,459.20-2,187.78

Finding the Fourth Proportional to 3,956.51, 5,459.20 and 2,187.78

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Solution

The fourth proportional to 3,956.51, 5,459.20 and 2,187.78 is: 3,018.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,956.51 : 5,459.20 = 2,187.78 : x
  2. Step 2: Convert to fraction form
    3,956.51/5,459.20 = 2,187.78/x
  3. Step 3: Cross multiply
    3,956.51x = 5,459.20 × 2,187.78
  4. Step 4: Simplify right side
    3,956.51x = 11,943,502.63
  5. Step 5: Solve for x
    x = 11,943,502.63/3,956.51
  6. Step 6: Final answer
    x = 3,018.69

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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.