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Finding the Fourth Proportional to 5,788.31, 7,987.91 and 3,135.69

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Solution

The fourth proportional to 5,788.31, 7,987.91 and 3,135.69 is: 4,327.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,788.31 : 7,987.91 = 3,135.69 : x
  2. Step 2: Convert to fraction form
    5,788.31/7,987.91 = 3,135.69/x
  3. Step 3: Cross multiply
    5,788.31x = 7,987.91 × 3,135.69
  4. Step 4: Simplify right side
    5,788.31x = 25,047,593.83
  5. Step 5: Solve for x
    x = 25,047,593.83/5,788.31
  6. Step 6: Final answer
    x = 4,327.28

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1.5x scale

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.