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Finding the Fourth Proportional to 8,706.78, 12,015 and 4,727.79

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Solution

The fourth proportional to 8,706.78, 12,015 and 4,727.79 is: 6,524.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.78 : 12,015 = 4,727.79 : x
  2. Step 2: Convert to fraction form
    8,706.78/12,015 = 4,727.79/x
  3. Step 3: Cross multiply
    8,706.78x = 12,015 × 4,727.79
  4. Step 4: Simplify right side
    8,706.78x = 56,804,396.85
  5. Step 5: Solve for x
    x = 56,804,396.85/8,706.78
  6. Step 6: Final answer
    x = 6,524.16

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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.