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Finding the Fourth Proportional to 20,889.98, 31,337.90 and 6,099.99

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Solution

The fourth proportional to 20,889.98, 31,337.90 and 6,099.99 is: 9,150.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.98 : 31,337.90 = 6,099.99 : x
  2. Step 2: Convert to fraction form
    20,889.98/31,337.90 = 6,099.99/x
  3. Step 3: Cross multiply
    20,889.98x = 31,337.90 × 6,099.99
  4. Step 4: Simplify right side
    20,889.98x = 191,160,876.62
  5. Step 5: Solve for x
    x = 191,160,876.62/20,889.98
  6. Step 6: Final answer
    x = 9,150.84

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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.