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Finding the Fourth Proportional to 8,706.65, 12,015.47 and 4,878.46

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Solution

The fourth proportional to 8,706.65, 12,015.47 and 4,878.46 is: 6,732.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.65 : 12,015.47 = 4,878.46 : x
  2. Step 2: Convert to fraction form
    8,706.65/12,015.47 = 4,878.46/x
  3. Step 3: Cross multiply
    8,706.65x = 12,015.47 × 4,878.46
  4. Step 4: Simplify right side
    8,706.65x = 58,616,905.31
  5. Step 5: Solve for x
    x = 58,616,905.31/8,706.65
  6. Step 6: Final answer
    x = 6,732.43

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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.