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Finding the Fourth Proportional to 6,240, 8,611.20 and 3,587.87

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Solution

The fourth proportional to 6,240, 8,611.20 and 3,587.87 is: 4,951.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,240 : 8,611.20 = 3,587.87 : x
  2. Step 2: Convert to fraction form
    6,240/8,611.20 = 3,587.87/x
  3. Step 3: Cross multiply
    6,240x = 8,611.20 × 3,587.87
  4. Step 4: Simplify right side
    6,240x = 30,895,823.09
  5. Step 5: Solve for x
    x = 30,895,823.09/6,240
  6. Step 6: Final answer
    x = 4,951.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.