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Finding the Fourth Proportional to 19,155.22, 28,722.83 and 8,616.11

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Solution

The fourth proportional to 19,155.22, 28,722.83 and 8,616.11 is: 12,919.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,155.22 : 28,722.83 = 8,616.11 : x
  2. Step 2: Convert to fraction form
    19,155.22/28,722.83 = 8,616.11/x
  3. Step 3: Cross multiply
    19,155.22x = 28,722.83 × 8,616.11
  4. Step 4: Simplify right side
    19,155.22x = 247,478,876.10
  5. Step 5: Solve for x
    x = 247,478,876.10/19,155.22
  6. Step 6: Final answer
    x = 12,919.66

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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.