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Finding the Fourth Proportional to 6,656.79, 9,991.32 and 3,372.21

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Solution

The fourth proportional to 6,656.79, 9,991.32 and 3,372.21 is: 5,061.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,656.79 : 9,991.32 = 3,372.21 : x
  2. Step 2: Convert to fraction form
    6,656.79/9,991.32 = 3,372.21/x
  3. Step 3: Cross multiply
    6,656.79x = 9,991.32 × 3,372.21
  4. Step 4: Simplify right side
    6,656.79x = 33,692,829.22
  5. Step 5: Solve for x
    x = 33,692,829.22/6,656.79
  6. Step 6: Final answer
    x = 5,061.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.