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Finding the Fourth Proportional to 29,299.20, 43,981.20 and 18,218.40

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Solution

The fourth proportional to 29,299.20, 43,981.20 and 18,218.40 is: 27,347.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,299.20 : 43,981.20 = 18,218.40 : x
  2. Step 2: Convert to fraction form
    29,299.20/43,981.20 = 18,218.40/x
  3. Step 3: Cross multiply
    29,299.20x = 43,981.20 × 18,218.40
  4. Step 4: Simplify right side
    29,299.20x = 801,267,094.08
  5. Step 5: Solve for x
    x = 801,267,094.08/29,299.20
  6. Step 6: Final answer
    x = 27,347.75

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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.