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Finding the Fourth Proportional to 19,421.60, 29,132.40 and 18,514.40

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Solution

The fourth proportional to 19,421.60, 29,132.40 and 18,514.40 is: 27,771.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,421.60 : 29,132.40 = 18,514.40 : x
  2. Step 2: Convert to fraction form
    19,421.60/29,132.40 = 18,514.40/x
  3. Step 3: Cross multiply
    19,421.60x = 29,132.40 × 18,514.40
  4. Step 4: Simplify right side
    19,421.60x = 539,368,906.56
  5. Step 5: Solve for x
    x = 539,368,906.56/19,421.60
  6. Step 6: Final answer
    x = 27,771.60

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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.