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Finding the Fourth Proportional to 8,718.56, 13,079.90 and 6,946.35

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Solution

The fourth proportional to 8,718.56, 13,079.90 and 6,946.35 is: 10,421.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.56 : 13,079.90 = 6,946.35 : x
  2. Step 2: Convert to fraction form
    8,718.56/13,079.90 = 6,946.35/x
  3. Step 3: Cross multiply
    8,718.56x = 13,079.90 × 6,946.35
  4. Step 4: Simplify right side
    8,718.56x = 90,857,563.37
  5. Step 5: Solve for x
    x = 90,857,563.37/8,718.56
  6. Step 6: Final answer
    x = 10,421.17

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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.