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Finding the Fourth Proportional to 20,108.80, 30,165.90 and 6,965.20

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Solution

The fourth proportional to 20,108.80, 30,165.90 and 6,965.20 is: 10,448.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.80 : 30,165.90 = 6,965.20 : x
  2. Step 2: Convert to fraction form
    20,108.80/30,165.90 = 6,965.20/x
  3. Step 3: Cross multiply
    20,108.80x = 30,165.90 × 6,965.20
  4. Step 4: Simplify right side
    20,108.80x = 210,111,526.68
  5. Step 5: Solve for x
    x = 210,111,526.68/20,108.80
  6. Step 6: Final answer
    x = 10,448.74

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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.