Home / 20,905.50-28,853.25-11,953.38

Finding the Fourth Proportional to 20,905.50, 28,853.25 and 11,953.38

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Solution

The fourth proportional to 20,905.50, 28,853.25 and 11,953.38 is: 16,497.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.50 : 28,853.25 = 11,953.38 : x
  2. Step 2: Convert to fraction form
    20,905.50/28,853.25 = 11,953.38/x
  3. Step 3: Cross multiply
    20,905.50x = 28,853.25 × 11,953.38
  4. Step 4: Simplify right side
    20,905.50x = 344,893,861.49
  5. Step 5: Solve for x
    x = 344,893,861.49/20,905.50
  6. Step 6: Final answer
    x = 16,497.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.