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Finding the Fourth Proportional to 18,667.87, 28,006.52 and 5,520.22

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Solution

The fourth proportional to 18,667.87, 28,006.52 and 5,520.22 is: 8,281.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.87 : 28,006.52 = 5,520.22 : x
  2. Step 2: Convert to fraction form
    18,667.87/28,006.52 = 5,520.22/x
  3. Step 3: Cross multiply
    18,667.87x = 28,006.52 × 5,520.22
  4. Step 4: Simplify right side
    18,667.87x = 154,602,151.83
  5. Step 5: Solve for x
    x = 154,602,151.83/18,667.87
  6. Step 6: Final answer
    x = 8,281.72

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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.