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Finding the Fourth Proportional to 18,667.68, 28,006.24 and 5,520

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Solution

The fourth proportional to 18,667.68, 28,006.24 and 5,520 is: 8,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.68 : 28,006.24 = 5,520 : x
  2. Step 2: Convert to fraction form
    18,667.68/28,006.24 = 5,520/x
  3. Step 3: Cross multiply
    18,667.68x = 28,006.24 × 5,520
  4. Step 4: Simplify right side
    18,667.68x = 154,594,444.80
  5. Step 5: Solve for x
    x = 154,594,444.80/18,667.68
  6. Step 6: Final answer
    x = 8,281.40

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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.