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Finding the Fourth Proportional to 19,489.70, 29,234.55 and 13,268.90

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Solution

The fourth proportional to 19,489.70, 29,234.55 and 13,268.90 is: 19,903.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.70 : 29,234.55 = 13,268.90 : x
  2. Step 2: Convert to fraction form
    19,489.70/29,234.55 = 13,268.90/x
  3. Step 3: Cross multiply
    19,489.70x = 29,234.55 × 13,268.90
  4. Step 4: Simplify right side
    19,489.70x = 387,910,320.50
  5. Step 5: Solve for x
    x = 387,910,320.50/19,489.70
  6. Step 6: Final answer
    x = 19,903.35

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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.