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Finding the Fourth Proportional to 8,706.56, 12,007.74 and 5,720.06

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Solution

The fourth proportional to 8,706.56, 12,007.74 and 5,720.06 is: 7,888.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.56 : 12,007.74 = 5,720.06 : x
  2. Step 2: Convert to fraction form
    8,706.56/12,007.74 = 5,720.06/x
  3. Step 3: Cross multiply
    8,706.56x = 12,007.74 × 5,720.06
  4. Step 4: Simplify right side
    8,706.56x = 68,684,993.26
  5. Step 5: Solve for x
    x = 68,684,993.26/8,706.56
  6. Step 6: Final answer
    x = 7,888.88

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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.