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Finding the Fourth Proportional to 13,218.50, 18,241.53 and 7,330.50

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Solution

The fourth proportional to 13,218.50, 18,241.53 and 7,330.50 is: 10,116.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.50 : 18,241.53 = 7,330.50 : x
  2. Step 2: Convert to fraction form
    13,218.50/18,241.53 = 7,330.50/x
  3. Step 3: Cross multiply
    13,218.50x = 18,241.53 × 7,330.50
  4. Step 4: Simplify right side
    13,218.50x = 133,719,535.67
  5. Step 5: Solve for x
    x = 133,719,535.67/13,218.50
  6. Step 6: Final answer
    x = 10,116.09

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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.