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Finding the Fourth Proportional to 18,307.68, 27,459.09 and 7,211.49

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Solution

The fourth proportional to 18,307.68, 27,459.09 and 7,211.49 is: 10,816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,307.68 : 27,459.09 = 7,211.49 : x
  2. Step 2: Convert to fraction form
    18,307.68/27,459.09 = 7,211.49/x
  3. Step 3: Cross multiply
    18,307.68x = 27,459.09 × 7,211.49
  4. Step 4: Simplify right side
    18,307.68x = 198,020,952.94
  5. Step 5: Solve for x
    x = 198,020,952.94/18,307.68
  6. Step 6: Final answer
    x = 10,816.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.