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Finding the Fourth Proportional to 13,190.52, 18,202.18 and 7,221

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Solution

The fourth proportional to 13,190.52, 18,202.18 and 7,221 is: 9,964.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.52 : 18,202.18 = 7,221 : x
  2. Step 2: Convert to fraction form
    13,190.52/18,202.18 = 7,221/x
  3. Step 3: Cross multiply
    13,190.52x = 18,202.18 × 7,221
  4. Step 4: Simplify right side
    13,190.52x = 131,437,941.78
  5. Step 5: Solve for x
    x = 131,437,941.78/13,190.52
  6. Step 6: Final answer
    x = 9,964.58

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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.