Home / 20,845.08-28,770.30-11,891.70

Finding the Fourth Proportional to 20,845.08, 28,770.30 and 11,891.70

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Solution

The fourth proportional to 20,845.08, 28,770.30 and 11,891.70 is: 16,412.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.08 : 28,770.30 = 11,891.70 : x
  2. Step 2: Convert to fraction form
    20,845.08/28,770.30 = 11,891.70/x
  3. Step 3: Cross multiply
    20,845.08x = 28,770.30 × 11,891.70
  4. Step 4: Simplify right side
    20,845.08x = 342,127,776.51
  5. Step 5: Solve for x
    x = 342,127,776.51/20,845.08
  6. Step 6: Final answer
    x = 16,412.88

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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.