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Finding the Fourth Proportional to 36,612.40, 54,845.70 and 21,011.80

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Solution

The fourth proportional to 36,612.40, 54,845.70 and 21,011.80 is: 31,475.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,612.40 : 54,845.70 = 21,011.80 : x
  2. Step 2: Convert to fraction form
    36,612.40/54,845.70 = 21,011.80/x
  3. Step 3: Cross multiply
    36,612.40x = 54,845.70 × 21,011.80
  4. Step 4: Simplify right side
    36,612.40x = 1,152,406,879.26
  5. Step 5: Solve for x
    x = 1,152,406,879.26/36,612.40
  6. Step 6: Final answer
    x = 31,475.86

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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.