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Finding the Fourth Proportional to 19,620.80, 29,488.80 and 17,086.40

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Solution

The fourth proportional to 19,620.80, 29,488.80 and 17,086.40 is: 25,679.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,620.80 : 29,488.80 = 17,086.40 : x
  2. Step 2: Convert to fraction form
    19,620.80/29,488.80 = 17,086.40/x
  3. Step 3: Cross multiply
    19,620.80x = 29,488.80 × 17,086.40
  4. Step 4: Simplify right side
    19,620.80x = 503,857,432.32
  5. Step 5: Solve for x
    x = 503,857,432.32/19,620.80
  6. Step 6: Final answer
    x = 25,679.76

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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.