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Finding the Fourth Proportional to 18,245.10, 27,347.40 and 7,148.10

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Solution

The fourth proportional to 18,245.10, 27,347.40 and 7,148.10 is: 10,714.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,245.10 : 27,347.40 = 7,148.10 : x
  2. Step 2: Convert to fraction form
    18,245.10/27,347.40 = 7,148.10/x
  3. Step 3: Cross multiply
    18,245.10x = 27,347.40 × 7,148.10
  4. Step 4: Simplify right side
    18,245.10x = 195,481,949.94
  5. Step 5: Solve for x
    x = 195,481,949.94/18,245.10
  6. Step 6: Final answer
    x = 10,714.22

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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.