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Finding the Fourth Proportional to 36,811.20, 55,216.80 and 9,109.20

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Solution

The fourth proportional to 36,811.20, 55,216.80 and 9,109.20 is: 13,663.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,811.20 : 55,216.80 = 9,109.20 : x
  2. Step 2: Convert to fraction form
    36,811.20/55,216.80 = 9,109.20/x
  3. Step 3: Cross multiply
    36,811.20x = 55,216.80 × 9,109.20
  4. Step 4: Simplify right side
    36,811.20x = 502,980,874.56
  5. Step 5: Solve for x
    x = 502,980,874.56/36,811.20
  6. Step 6: Final answer
    x = 13,663.80

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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.