Home / 5,428.90-8,146.05-2,142.10

Finding the Fourth Proportional to 5,428.90, 8,146.05 and 2,142.10

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Solution

The fourth proportional to 5,428.90, 8,146.05 and 2,142.10 is: 3,214.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.90 : 8,146.05 = 2,142.10 : x
  2. Step 2: Convert to fraction form
    5,428.90/8,146.05 = 2,142.10/x
  3. Step 3: Cross multiply
    5,428.90x = 8,146.05 × 2,142.10
  4. Step 4: Simplify right side
    5,428.90x = 17,449,653.71
  5. Step 5: Solve for x
    x = 17,449,653.71/5,428.90
  6. Step 6: Final answer
    x = 3,214.22

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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.