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Finding the Fourth Proportional to 11,381.74, 15,700.02 and 8,859.86

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Solution

The fourth proportional to 11,381.74, 15,700.02 and 8,859.86 is: 12,221.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,381.74 : 15,700.02 = 8,859.86 : x
  2. Step 2: Convert to fraction form
    11,381.74/15,700.02 = 8,859.86/x
  3. Step 3: Cross multiply
    11,381.74x = 15,700.02 × 8,859.86
  4. Step 4: Simplify right side
    11,381.74x = 139,099,926.35
  5. Step 5: Solve for x
    x = 139,099,926.35/11,381.74
  6. Step 6: Final answer
    x = 12,221.33

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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.