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Finding the Fourth Proportional to 18,706.85, 28,064.93 and 5,559.22

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Solution

The fourth proportional to 18,706.85, 28,064.93 and 5,559.22 is: 8,340.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.85 : 28,064.93 = 5,559.22 : x
  2. Step 2: Convert to fraction form
    18,706.85/28,064.93 = 5,559.22/x
  3. Step 3: Cross multiply
    18,706.85x = 28,064.93 × 5,559.22
  4. Step 4: Simplify right side
    18,706.85x = 156,019,000.85
  5. Step 5: Solve for x
    x = 156,019,000.85/18,706.85
  6. Step 6: Final answer
    x = 8,340.21

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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.