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Finding the Fourth Proportional to 20,641.86, 30,966.45 and 6,603.15

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Solution

The fourth proportional to 20,641.86, 30,966.45 and 6,603.15 is: 9,905.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.86 : 30,966.45 = 6,603.15 : x
  2. Step 2: Convert to fraction form
    20,641.86/30,966.45 = 6,603.15/x
  3. Step 3: Cross multiply
    20,641.86x = 30,966.45 × 6,603.15
  4. Step 4: Simplify right side
    20,641.86x = 204,476,114.32
  5. Step 5: Solve for x
    x = 204,476,114.32/20,641.86
  6. Step 6: Final answer
    x = 9,905.90

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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.