Home / 20,590.56-28,419.12-12,205.44

Finding the Fourth Proportional to 20,590.56, 28,419.12 and 12,205.44

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Solution

The fourth proportional to 20,590.56, 28,419.12 and 12,205.44 is: 16,845.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.56 : 28,419.12 = 12,205.44 : x
  2. Step 2: Convert to fraction form
    20,590.56/28,419.12 = 12,205.44/x
  3. Step 3: Cross multiply
    20,590.56x = 28,419.12 × 12,205.44
  4. Step 4: Simplify right side
    20,590.56x = 346,867,864.01
  5. Step 5: Solve for x
    x = 346,867,864.01/20,590.56
  6. Step 6: Final answer
    x = 16,845.97

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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.