Home / 8,639.54-11,919.04-5,451.75

Finding the Fourth Proportional to 8,639.54, 11,919.04 and 5,451.75

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Solution

The fourth proportional to 8,639.54, 11,919.04 and 5,451.75 is: 7,521.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.54 : 11,919.04 = 5,451.75 : x
  2. Step 2: Convert to fraction form
    8,639.54/11,919.04 = 5,451.75/x
  3. Step 3: Cross multiply
    8,639.54x = 11,919.04 × 5,451.75
  4. Step 4: Simplify right side
    8,639.54x = 64,979,626.32
  5. Step 5: Solve for x
    x = 64,979,626.32/8,639.54
  6. Step 6: Final answer
    x = 7,521.19

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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.