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Finding the Fourth Proportional to 8,727.80, 13,077.30 and 7,431.80

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Solution

The fourth proportional to 8,727.80, 13,077.30 and 7,431.80 is: 11,135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,727.80 : 13,077.30 = 7,431.80 : x
  2. Step 2: Convert to fraction form
    8,727.80/13,077.30 = 7,431.80/x
  3. Step 3: Cross multiply
    8,727.80x = 13,077.30 × 7,431.80
  4. Step 4: Simplify right side
    8,727.80x = 97,187,878.14
  5. Step 5: Solve for x
    x = 97,187,878.14/8,727.80
  6. Step 6: Final answer
    x = 11,135.44

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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.