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Finding the Fourth Proportional to 13,165.79, 18,169.22 and 7,197.32

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Solution

The fourth proportional to 13,165.79, 18,169.22 and 7,197.32 is: 9,932.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,165.79 : 18,169.22 = 7,197.32 : x
  2. Step 2: Convert to fraction form
    13,165.79/18,169.22 = 7,197.32/x
  3. Step 3: Cross multiply
    13,165.79x = 18,169.22 × 7,197.32
  4. Step 4: Simplify right side
    13,165.79x = 130,769,753.91
  5. Step 5: Solve for x
    x = 130,769,753.91/13,165.79
  6. Step 6: Final answer
    x = 9,932.55

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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.