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Finding the Fourth Proportional to 5,486, 7,570.77 and 3,129.44

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Solution

The fourth proportional to 5,486, 7,570.77 and 3,129.44 is: 4,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,486 : 7,570.77 = 3,129.44 : x
  2. Step 2: Convert to fraction form
    5,486/7,570.77 = 3,129.44/x
  3. Step 3: Cross multiply
    5,486x = 7,570.77 × 3,129.44
  4. Step 4: Simplify right side
    5,486x = 23,692,270.47
  5. Step 5: Solve for x
    x = 23,692,270.47/5,486
  6. Step 6: Final answer
    x = 4,318.68

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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.