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Finding the Fourth Proportional to 5,643.84, 7,788.46 and 3,159.84

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Solution

The fourth proportional to 5,643.84, 7,788.46 and 3,159.84 is: 4,360.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,643.84 : 7,788.46 = 3,159.84 : x
  2. Step 2: Convert to fraction form
    5,643.84/7,788.46 = 3,159.84/x
  3. Step 3: Cross multiply
    5,643.84x = 7,788.46 × 3,159.84
  4. Step 4: Simplify right side
    5,643.84x = 24,610,287.45
  5. Step 5: Solve for x
    x = 24,610,287.45/5,643.84
  6. Step 6: Final answer
    x = 4,360.56

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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.