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Finding the Fourth Proportional to 11,159.94, 15,399.39 and 6,621.90

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Solution

The fourth proportional to 11,159.94, 15,399.39 and 6,621.90 is: 9,137.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,159.94 : 15,399.39 = 6,621.90 : x
  2. Step 2: Convert to fraction form
    11,159.94/15,399.39 = 6,621.90/x
  3. Step 3: Cross multiply
    11,159.94x = 15,399.39 × 6,621.90
  4. Step 4: Simplify right side
    11,159.94x = 101,973,220.64
  5. Step 5: Solve for x
    x = 101,973,220.64/11,159.94
  6. Step 6: Final answer
    x = 9,137.43

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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.