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Finding the Fourth Proportional to 15,193.86, 20,967 and 8,479.36

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Solution

The fourth proportional to 15,193.86, 20,967 and 8,479.36 is: 11,701.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,193.86 : 20,967 = 8,479.36 : x
  2. Step 2: Convert to fraction form
    15,193.86/20,967 = 8,479.36/x
  3. Step 3: Cross multiply
    15,193.86x = 20,967 × 8,479.36
  4. Step 4: Simplify right side
    15,193.86x = 177,786,741.12
  5. Step 5: Solve for x
    x = 177,786,741.12/15,193.86
  6. Step 6: Final answer
    x = 11,701.22

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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.