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Finding the Fourth Proportional to 11,435.76, 15,781 and 6,467.76

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Solution

The fourth proportional to 11,435.76, 15,781 and 6,467.76 is: 8,925.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,435.76 : 15,781 = 6,467.76 : x
  2. Step 2: Convert to fraction form
    11,435.76/15,781 = 6,467.76/x
  3. Step 3: Cross multiply
    11,435.76x = 15,781 × 6,467.76
  4. Step 4: Simplify right side
    11,435.76x = 102,067,720.56
  5. Step 5: Solve for x
    x = 102,067,720.56/11,435.76
  6. Step 6: Final answer
    x = 8,925.31

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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.