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Finding the Fourth Proportional to 8,706.18, 12,014.97 and 5,122.20

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Solution

The fourth proportional to 8,706.18, 12,014.97 and 5,122.20 is: 7,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.18 : 12,014.97 = 5,122.20 : x
  2. Step 2: Convert to fraction form
    8,706.18/12,014.97 = 5,122.20/x
  3. Step 3: Cross multiply
    8,706.18x = 12,014.97 × 5,122.20
  4. Step 4: Simplify right side
    8,706.18x = 61,543,079.33
  5. Step 5: Solve for x
    x = 61,543,079.33/8,706.18
  6. Step 6: Final answer
    x = 7,068.90

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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.