Home / 4,087.28-6,129.40-1,621.36

Finding the Fourth Proportional to 4,087.28, 6,129.40 and 1,621.36

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Solution

The fourth proportional to 4,087.28, 6,129.40 and 1,621.36 is: 2,431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,087.28 : 6,129.40 = 1,621.36 : x
  2. Step 2: Convert to fraction form
    4,087.28/6,129.40 = 1,621.36/x
  3. Step 3: Cross multiply
    4,087.28x = 6,129.40 × 1,621.36
  4. Step 4: Simplify right side
    4,087.28x = 9,937,963.98
  5. Step 5: Solve for x
    x = 9,937,963.98/4,087.28
  6. Step 6: Final answer
    x = 2,431.44

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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.