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Finding the Fourth Proportional to 8,476.34, 12,718.61 and 5,187.64

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Solution

The fourth proportional to 8,476.34, 12,718.61 and 5,187.64 is: 7,783.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,476.34 : 12,718.61 = 5,187.64 : x
  2. Step 2: Convert to fraction form
    8,476.34/12,718.61 = 5,187.64/x
  3. Step 3: Cross multiply
    8,476.34x = 12,718.61 × 5,187.64
  4. Step 4: Simplify right side
    8,476.34x = 65,979,505.19
  5. Step 5: Solve for x
    x = 65,979,505.19/8,476.34
  6. Step 6: Final answer
    x = 7,783.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.