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Finding the Fourth Proportional to 5,611.88, 8,407.06 and 3,139.22

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Solution

The fourth proportional to 5,611.88, 8,407.06 and 3,139.22 is: 4,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,611.88 : 8,407.06 = 3,139.22 : x
  2. Step 2: Convert to fraction form
    5,611.88/8,407.06 = 3,139.22/x
  3. Step 3: Cross multiply
    5,611.88x = 8,407.06 × 3,139.22
  4. Step 4: Simplify right side
    5,611.88x = 26,391,624.06
  5. Step 5: Solve for x
    x = 26,391,624.06/5,611.88
  6. Step 6: Final answer
    x = 4,702.81

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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.