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Finding the Fourth Proportional to 20,398.35, 30,597.90 and 5,607.18

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Solution

The fourth proportional to 20,398.35, 30,597.90 and 5,607.18 is: 8,410.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.35 : 30,597.90 = 5,607.18 : x
  2. Step 2: Convert to fraction form
    20,398.35/30,597.90 = 5,607.18/x
  3. Step 3: Cross multiply
    20,398.35x = 30,597.90 × 5,607.18
  4. Step 4: Simplify right side
    20,398.35x = 171,567,932.92
  5. Step 5: Solve for x
    x = 171,567,932.92/20,398.35
  6. Step 6: Final answer
    x = 8,410.87

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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.