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Finding the Fourth Proportional to 8,312.44, 11,460.12 and 6,890.80

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Solution

The fourth proportional to 8,312.44, 11,460.12 and 6,890.80 is: 9,500.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.44 : 11,460.12 = 6,890.80 : x
  2. Step 2: Convert to fraction form
    8,312.44/11,460.12 = 6,890.80/x
  3. Step 3: Cross multiply
    8,312.44x = 11,460.12 × 6,890.80
  4. Step 4: Simplify right side
    8,312.44x = 78,969,394.90
  5. Step 5: Solve for x
    x = 78,969,394.90/8,312.44
  6. Step 6: Final answer
    x = 9,500.15

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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.