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Finding the Fourth Proportional to 19,679.60, 29,519.40 and 18,604.40

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Solution

The fourth proportional to 19,679.60, 29,519.40 and 18,604.40 is: 27,906.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.60 : 29,519.40 = 18,604.40 : x
  2. Step 2: Convert to fraction form
    19,679.60/29,519.40 = 18,604.40/x
  3. Step 3: Cross multiply
    19,679.60x = 29,519.40 × 18,604.40
  4. Step 4: Simplify right side
    19,679.60x = 549,190,725.36
  5. Step 5: Solve for x
    x = 549,190,725.36/19,679.60
  6. Step 6: Final answer
    x = 27,906.60

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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.