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Finding the Fourth Proportional to 18,778.83, 28,148.52 and 8,906.28

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Solution

The fourth proportional to 18,778.83, 28,148.52 and 8,906.28 is: 13,350.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.83 : 28,148.52 = 8,906.28 : x
  2. Step 2: Convert to fraction form
    18,778.83/28,148.52 = 8,906.28/x
  3. Step 3: Cross multiply
    18,778.83x = 28,148.52 × 8,906.28
  4. Step 4: Simplify right side
    18,778.83x = 250,698,600.71
  5. Step 5: Solve for x
    x = 250,698,600.71/18,778.83
  6. Step 6: Final answer
    x = 13,350.06

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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.