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Finding the Fourth Proportional to 19,659.40, 29,489.10 and 16,419.40

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Solution

The fourth proportional to 19,659.40, 29,489.10 and 16,419.40 is: 24,629.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.40 : 29,489.10 = 16,419.40 : x
  2. Step 2: Convert to fraction form
    19,659.40/29,489.10 = 16,419.40/x
  3. Step 3: Cross multiply
    19,659.40x = 29,489.10 × 16,419.40
  4. Step 4: Simplify right side
    19,659.40x = 484,193,328.54
  5. Step 5: Solve for x
    x = 484,193,328.54/19,659.40
  6. Step 6: Final answer
    x = 24,629.10

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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.