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Finding the Fourth Proportional to 13,191.81, 18,204.75 and 7,223.52

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Solution

The fourth proportional to 13,191.81, 18,204.75 and 7,223.52 is: 9,968.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.81 : 18,204.75 = 7,223.52 : x
  2. Step 2: Convert to fraction form
    13,191.81/18,204.75 = 7,223.52/x
  3. Step 3: Cross multiply
    13,191.81x = 18,204.75 × 7,223.52
  4. Step 4: Simplify right side
    13,191.81x = 131,502,375.72
  5. Step 5: Solve for x
    x = 131,502,375.72/13,191.81
  6. Step 6: Final answer
    x = 9,968.49

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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.