Home / 6,621.15-9,139.78-3,968.04

Finding the Fourth Proportional to 6,621.15, 9,139.78 and 3,968.04

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Solution

The fourth proportional to 6,621.15, 9,139.78 and 3,968.04 is: 5,477.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.15 : 9,139.78 = 3,968.04 : x
  2. Step 2: Convert to fraction form
    6,621.15/9,139.78 = 3,968.04/x
  3. Step 3: Cross multiply
    6,621.15x = 9,139.78 × 3,968.04
  4. Step 4: Simplify right side
    6,621.15x = 36,267,037.32
  5. Step 5: Solve for x
    x = 36,267,037.32/6,621.15
  6. Step 6: Final answer
    x = 5,477.46

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1.5x scale

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.