Home / 2,621.71-3,931.98-2,185.75

Finding the Fourth Proportional to 2,621.71, 3,931.98 and 2,185.75

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Solution

The fourth proportional to 2,621.71, 3,931.98 and 2,185.75 is: 3,278.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.71 : 3,931.98 = 2,185.75 : x
  2. Step 2: Convert to fraction form
    2,621.71/3,931.98 = 2,185.75/x
  3. Step 3: Cross multiply
    2,621.71x = 3,931.98 × 2,185.75
  4. Step 4: Simplify right side
    2,621.71x = 8,594,325.29
  5. Step 5: Solve for x
    x = 8,594,325.29/2,621.71
  6. Step 6: Final answer
    x = 3,278.14

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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.