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Finding the Fourth Proportional to 19,006.20, 28,509.30 and 7,909.20

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Solution

The fourth proportional to 19,006.20, 28,509.30 and 7,909.20 is: 11,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,006.20 : 28,509.30 = 7,909.20 : x
  2. Step 2: Convert to fraction form
    19,006.20/28,509.30 = 7,909.20/x
  3. Step 3: Cross multiply
    19,006.20x = 28,509.30 × 7,909.20
  4. Step 4: Simplify right side
    19,006.20x = 225,485,755.56
  5. Step 5: Solve for x
    x = 225,485,755.56/19,006.20
  6. Step 6: Final answer
    x = 11,863.80

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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.