Home / 5,622.39-8,428.64-2,157.21

Finding the Fourth Proportional to 5,622.39, 8,428.64 and 2,157.21

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Solution

The fourth proportional to 5,622.39, 8,428.64 and 2,157.21 is: 3,233.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,622.39 : 8,428.64 = 2,157.21 : x
  2. Step 2: Convert to fraction form
    5,622.39/8,428.64 = 2,157.21/x
  3. Step 3: Cross multiply
    5,622.39x = 8,428.64 × 2,157.21
  4. Step 4: Simplify right side
    5,622.39x = 18,182,335.71
  5. Step 5: Solve for x
    x = 18,182,335.71/5,622.39
  6. Step 6: Final answer
    x = 3,233.92

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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.