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Finding the Fourth Proportional to 11,415, 15,753.06 and 6,379.44

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Solution

The fourth proportional to 11,415, 15,753.06 and 6,379.44 is: 8,803.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,415 : 15,753.06 = 6,379.44 : x
  2. Step 2: Convert to fraction form
    11,415/15,753.06 = 6,379.44/x
  3. Step 3: Cross multiply
    11,415x = 15,753.06 × 6,379.44
  4. Step 4: Simplify right side
    11,415x = 100,495,701.09
  5. Step 5: Solve for x
    x = 100,495,701.09/11,415
  6. Step 6: Final answer
    x = 8,803.83

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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.