Home / 5,317.60-7,348.40-3,989

Finding the Fourth Proportional to 5,317.60, 7,348.40 and 3,989

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Solution

The fourth proportional to 5,317.60, 7,348.40 and 3,989 is: 5,512.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,317.60 : 7,348.40 = 3,989 : x
  2. Step 2: Convert to fraction form
    5,317.60/7,348.40 = 3,989/x
  3. Step 3: Cross multiply
    5,317.60x = 7,348.40 × 3,989
  4. Step 4: Simplify right side
    5,317.60x = 29,312,767.60
  5. Step 5: Solve for x
    x = 29,312,767.60/5,317.60
  6. Step 6: Final answer
    x = 5,512.41

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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.