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Finding the Fourth Proportional to 20,562.69, 30,845.16 and 6,521.70

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Solution

The fourth proportional to 20,562.69, 30,845.16 and 6,521.70 is: 9,782.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.69 : 30,845.16 = 6,521.70 : x
  2. Step 2: Convert to fraction form
    20,562.69/30,845.16 = 6,521.70/x
  3. Step 3: Cross multiply
    20,562.69x = 30,845.16 × 6,521.70
  4. Step 4: Simplify right side
    20,562.69x = 201,162,973.39
  5. Step 5: Solve for x
    x = 201,162,973.39/20,562.69
  6. Step 6: Final answer
    x = 9,782.91

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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.