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Finding the Fourth Proportional to 19,885.01, 29,805.64 and 8,191.85

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Solution

The fourth proportional to 19,885.01, 29,805.64 and 8,191.85 is: 12,278.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,885.01 : 29,805.64 = 8,191.85 : x
  2. Step 2: Convert to fraction form
    19,885.01/29,805.64 = 8,191.85/x
  3. Step 3: Cross multiply
    19,885.01x = 29,805.64 × 8,191.85
  4. Step 4: Simplify right side
    19,885.01x = 244,163,332.03
  5. Step 5: Solve for x
    x = 244,163,332.03/19,885.01
  6. Step 6: Final answer
    x = 12,278.76

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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.