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Finding the Fourth Proportional to 20,700.75, 30,892.04 and 18,486.30

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Solution

The fourth proportional to 20,700.75, 30,892.04 and 18,486.30 is: 27,587.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.75 : 30,892.04 = 18,486.30 : x
  2. Step 2: Convert to fraction form
    20,700.75/30,892.04 = 18,486.30/x
  3. Step 3: Cross multiply
    20,700.75x = 30,892.04 × 18,486.30
  4. Step 4: Simplify right side
    20,700.75x = 571,079,519.05
  5. Step 5: Solve for x
    x = 571,079,519.05/20,700.75
  6. Step 6: Final answer
    x = 27,587.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.