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Finding the Fourth Proportional to 6,991.80, 9,648.40 and 3,848

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Solution

The fourth proportional to 6,991.80, 9,648.40 and 3,848 is: 5,310.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.80 : 9,648.40 = 3,848 : x
  2. Step 2: Convert to fraction form
    6,991.80/9,648.40 = 3,848/x
  3. Step 3: Cross multiply
    6,991.80x = 9,648.40 × 3,848
  4. Step 4: Simplify right side
    6,991.80x = 37,127,043.20
  5. Step 5: Solve for x
    x = 37,127,043.20/6,991.80
  6. Step 6: Final answer
    x = 5,310.08

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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.