Home / 3,621.24-5,431.86-1,312.74

Finding the Fourth Proportional to 3,621.24, 5,431.86 and 1,312.74

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Solution

The fourth proportional to 3,621.24, 5,431.86 and 1,312.74 is: 1,969.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.24 : 5,431.86 = 1,312.74 : x
  2. Step 2: Convert to fraction form
    3,621.24/5,431.86 = 1,312.74/x
  3. Step 3: Cross multiply
    3,621.24x = 5,431.86 × 1,312.74
  4. Step 4: Simplify right side
    3,621.24x = 7,130,619.90
  5. Step 5: Solve for x
    x = 7,130,619.90/3,621.24
  6. Step 6: Final answer
    x = 1,969.11

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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.