Home / 6,621.90-9,135.60-3,969.56

Finding the Fourth Proportional to 6,621.90, 9,135.60 and 3,969.56

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Solution

The fourth proportional to 6,621.90, 9,135.60 and 3,969.56 is: 5,476.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.90 : 9,135.60 = 3,969.56 : x
  2. Step 2: Convert to fraction form
    6,621.90/9,135.60 = 3,969.56/x
  3. Step 3: Cross multiply
    6,621.90x = 9,135.60 × 3,969.56
  4. Step 4: Simplify right side
    6,621.90x = 36,264,312.34
  5. Step 5: Solve for x
    x = 36,264,312.34/6,621.90
  6. Step 6: Final answer
    x = 5,476.42

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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.