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Finding the Fourth Proportional to 37,489.40, 56,234.10 and 21,721.40

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Solution

The fourth proportional to 37,489.40, 56,234.10 and 21,721.40 is: 32,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,489.40 : 56,234.10 = 21,721.40 : x
  2. Step 2: Convert to fraction form
    37,489.40/56,234.10 = 21,721.40/x
  3. Step 3: Cross multiply
    37,489.40x = 56,234.10 × 21,721.40
  4. Step 4: Simplify right side
    37,489.40x = 1,221,483,379.74
  5. Step 5: Solve for x
    x = 1,221,483,379.74/37,489.40
  6. Step 6: Final answer
    x = 32,582.10

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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.