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Finding the Fourth Proportional to 18,913.29, 28,369.90 and 5,586.46

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Solution

The fourth proportional to 18,913.29, 28,369.90 and 5,586.46 is: 8,379.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.29 : 28,369.90 = 5,586.46 : x
  2. Step 2: Convert to fraction form
    18,913.29/28,369.90 = 5,586.46/x
  3. Step 3: Cross multiply
    18,913.29x = 28,369.90 × 5,586.46
  4. Step 4: Simplify right side
    18,913.29x = 158,487,311.55
  5. Step 5: Solve for x
    x = 158,487,311.55/18,913.29
  6. Step 6: Final answer
    x = 8,379.68

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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.