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Finding the Fourth Proportional to 18,278.40, 27,398.70 and 9,940.80

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Solution

The fourth proportional to 18,278.40, 27,398.70 and 9,940.80 is: 14,900.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.40 : 27,398.70 = 9,940.80 : x
  2. Step 2: Convert to fraction form
    18,278.40/27,398.70 = 9,940.80/x
  3. Step 3: Cross multiply
    18,278.40x = 27,398.70 × 9,940.80
  4. Step 4: Simplify right side
    18,278.40x = 272,364,996.96
  5. Step 5: Solve for x
    x = 272,364,996.96/18,278.40
  6. Step 6: Final answer
    x = 14,900.92

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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.