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Finding the Fourth Proportional to 20,874.68, 31,308.98 and 6,079.62

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Solution

The fourth proportional to 20,874.68, 31,308.98 and 6,079.62 is: 9,118.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.68 : 31,308.98 = 6,079.62 : x
  2. Step 2: Convert to fraction form
    20,874.68/31,308.98 = 6,079.62/x
  3. Step 3: Cross multiply
    20,874.68x = 31,308.98 × 6,079.62
  4. Step 4: Simplify right side
    20,874.68x = 190,346,700.99
  5. Step 5: Solve for x
    x = 190,346,700.99/20,874.68
  6. Step 6: Final answer
    x = 9,118.54

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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.