Home / 3,787.60-5,681.40-2,621.20

Finding the Fourth Proportional to 3,787.60, 5,681.40 and 2,621.20

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Solution

The fourth proportional to 3,787.60, 5,681.40 and 2,621.20 is: 3,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.60 : 5,681.40 = 2,621.20 : x
  2. Step 2: Convert to fraction form
    3,787.60/5,681.40 = 2,621.20/x
  3. Step 3: Cross multiply
    3,787.60x = 5,681.40 × 2,621.20
  4. Step 4: Simplify right side
    3,787.60x = 14,892,085.68
  5. Step 5: Solve for x
    x = 14,892,085.68/3,787.60
  6. Step 6: Final answer
    x = 3,931.80

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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.