Home / 5,272.43-7,920.90-4,989

Finding the Fourth Proportional to 5,272.43, 7,920.90 and 4,989

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Solution

The fourth proportional to 5,272.43, 7,920.90 and 4,989 is: 7,495.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,272.43 : 7,920.90 = 4,989 : x
  2. Step 2: Convert to fraction form
    5,272.43/7,920.90 = 4,989/x
  3. Step 3: Cross multiply
    5,272.43x = 7,920.90 × 4,989
  4. Step 4: Simplify right side
    5,272.43x = 39,517,370.10
  5. Step 5: Solve for x
    x = 39,517,370.10/5,272.43
  6. Step 6: Final answer
    x = 7,495.10

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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.