Home / 20,905.34-28,847.58-11,951.10

Finding the Fourth Proportional to 20,905.34, 28,847.58 and 11,951.10

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Solution

The fourth proportional to 20,905.34, 28,847.58 and 11,951.10 is: 16,491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.34 : 28,847.58 = 11,951.10 : x
  2. Step 2: Convert to fraction form
    20,905.34/28,847.58 = 11,951.10/x
  3. Step 3: Cross multiply
    20,905.34x = 28,847.58 × 11,951.10
  4. Step 4: Simplify right side
    20,905.34x = 344,760,313.34
  5. Step 5: Solve for x
    x = 344,760,313.34/20,905.34
  6. Step 6: Final answer
    x = 16,491.50

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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.