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Finding the Fourth Proportional to 25,105.80, 37,658.70 and 21,009.80

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Solution

The fourth proportional to 25,105.80, 37,658.70 and 21,009.80 is: 31,514.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,105.80 : 37,658.70 = 21,009.80 : x
  2. Step 2: Convert to fraction form
    25,105.80/37,658.70 = 21,009.80/x
  3. Step 3: Cross multiply
    25,105.80x = 37,658.70 × 21,009.80
  4. Step 4: Simplify right side
    25,105.80x = 791,201,755.26
  5. Step 5: Solve for x
    x = 791,201,755.26/25,105.80
  6. Step 6: Final answer
    x = 31,514.70

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Half scale
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Double scale
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Similar ratio
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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.