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Finding the Fourth Proportional to 20,590.79, 30,885.86 and 6,550.61

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Solution

The fourth proportional to 20,590.79, 30,885.86 and 6,550.61 is: 9,825.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.79 : 30,885.86 = 6,550.61 : x
  2. Step 2: Convert to fraction form
    20,590.79/30,885.86 = 6,550.61/x
  3. Step 3: Cross multiply
    20,590.79x = 30,885.86 × 6,550.61
  4. Step 4: Simplify right side
    20,590.79x = 202,321,036.19
  5. Step 5: Solve for x
    x = 202,321,036.19/20,590.79
  6. Step 6: Final answer
    x = 9,825.80

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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.