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Finding the Fourth Proportional to 20,645.59, 30,976.58 and 6,607.78

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Solution

The fourth proportional to 20,645.59, 30,976.58 and 6,607.78 is: 9,914.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.59 : 30,976.58 = 6,607.78 : x
  2. Step 2: Convert to fraction form
    20,645.59/30,976.58 = 6,607.78/x
  3. Step 3: Cross multiply
    20,645.59x = 30,976.58 × 6,607.78
  4. Step 4: Simplify right side
    20,645.59x = 204,686,425.79
  5. Step 5: Solve for x
    x = 204,686,425.79/20,645.59
  6. Step 6: Final answer
    x = 9,914.29

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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.