Home / 8,639.43-11,921.31-5,451.51

Finding the Fourth Proportional to 8,639.43, 11,921.31 and 5,451.51

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Solution

The fourth proportional to 8,639.43, 11,921.31 and 5,451.51 is: 7,522.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.43 : 11,921.31 = 5,451.51 : x
  2. Step 2: Convert to fraction form
    8,639.43/11,921.31 = 5,451.51/x
  3. Step 3: Cross multiply
    8,639.43x = 11,921.31 × 5,451.51
  4. Step 4: Simplify right side
    8,639.43x = 64,989,140.68
  5. Step 5: Solve for x
    x = 64,989,140.68/8,639.43
  6. Step 6: Final answer
    x = 7,522.39

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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.