Home / 3,917.50-5,405.88-2,148.74

Finding the Fourth Proportional to 3,917.50, 5,405.88 and 2,148.74

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Solution

The fourth proportional to 3,917.50, 5,405.88 and 2,148.74 is: 2,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.50 : 5,405.88 = 2,148.74 : x
  2. Step 2: Convert to fraction form
    3,917.50/5,405.88 = 2,148.74/x
  3. Step 3: Cross multiply
    3,917.50x = 5,405.88 × 2,148.74
  4. Step 4: Simplify right side
    3,917.50x = 11,615,830.59
  5. Step 5: Solve for x
    x = 11,615,830.59/3,917.50
  6. Step 6: Final answer
    x = 2,965.11

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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.