Home / 20,905.20-28,847.88-11,473.70

Finding the Fourth Proportional to 20,905.20, 28,847.88 and 11,473.70

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Solution

The fourth proportional to 20,905.20, 28,847.88 and 11,473.70 is: 15,832.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.20 : 28,847.88 = 11,473.70 : x
  2. Step 2: Convert to fraction form
    20,905.20/28,847.88 = 11,473.70/x
  3. Step 3: Cross multiply
    20,905.20x = 28,847.88 × 11,473.70
  4. Step 4: Simplify right side
    20,905.20x = 330,991,776.52
  5. Step 5: Solve for x
    x = 330,991,776.52/20,905.20
  6. Step 6: Final answer
    x = 15,832.99

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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.