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Finding the Fourth Proportional to 18,514.80, 27,747.90 and 7,412.40

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Solution

The fourth proportional to 18,514.80, 27,747.90 and 7,412.40 is: 11,108.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,514.80 : 27,747.90 = 7,412.40 : x
  2. Step 2: Convert to fraction form
    18,514.80/27,747.90 = 7,412.40/x
  3. Step 3: Cross multiply
    18,514.80x = 27,747.90 × 7,412.40
  4. Step 4: Simplify right side
    18,514.80x = 205,678,533.96
  5. Step 5: Solve for x
    x = 205,678,533.96/18,514.80
  6. Step 6: Final answer
    x = 11,108.87

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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.