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Finding the Fourth Proportional to 53,879.57, 80,819.35 and 20,603

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Solution

The fourth proportional to 53,879.57, 80,819.35 and 20,603 is: 30,904.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,879.57 : 80,819.35 = 20,603 : x
  2. Step 2: Convert to fraction form
    53,879.57/80,819.35 = 20,603/x
  3. Step 3: Cross multiply
    53,879.57x = 80,819.35 × 20,603
  4. Step 4: Simplify right side
    53,879.57x = 1,665,121,068.05
  5. Step 5: Solve for x
    x = 1,665,121,068.05/53,879.57
  6. Step 6: Final answer
    x = 30,904.50

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.