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Finding the Fourth Proportional to 27,218.70, 40,828.05 and 18,908.10

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Solution

The fourth proportional to 27,218.70, 40,828.05 and 18,908.10 is: 28,362.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,218.70 : 40,828.05 = 18,908.10 : x
  2. Step 2: Convert to fraction form
    27,218.70/40,828.05 = 18,908.10/x
  3. Step 3: Cross multiply
    27,218.70x = 40,828.05 × 18,908.10
  4. Step 4: Simplify right side
    27,218.70x = 771,980,852.21
  5. Step 5: Solve for x
    x = 771,980,852.21/27,218.70
  6. Step 6: Final answer
    x = 28,362.15

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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.