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Finding the Fourth Proportional to 55,267.95, 82,914.90 and 21,989.91

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Solution

The fourth proportional to 55,267.95, 82,914.90 and 21,989.91 is: 32,990.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,267.95 : 82,914.90 = 21,989.91 : x
  2. Step 2: Convert to fraction form
    55,267.95/82,914.90 = 21,989.91/x
  3. Step 3: Cross multiply
    55,267.95x = 82,914.90 × 21,989.91
  4. Step 4: Simplify right side
    55,267.95x = 1,823,291,188.66
  5. Step 5: Solve for x
    x = 1,823,291,188.66/55,267.95
  6. Step 6: Final answer
    x = 32,990.03

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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.