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Finding the Fourth Proportional to 19,866.38, 29,803.42 and 6,720.90

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Solution

The fourth proportional to 19,866.38, 29,803.42 and 6,720.90 is: 10,082.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,866.38 : 29,803.42 = 6,720.90 : x
  2. Step 2: Convert to fraction form
    19,866.38/29,803.42 = 6,720.90/x
  3. Step 3: Cross multiply
    19,866.38x = 29,803.42 × 6,720.90
  4. Step 4: Simplify right side
    19,866.38x = 200,305,805.48
  5. Step 5: Solve for x
    x = 200,305,805.48/19,866.38
  6. Step 6: Final answer
    x = 10,082.65

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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.