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Finding the Fourth Proportional to 14,479.34, 19,981.87 and 8,105.90

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Solution

The fourth proportional to 14,479.34, 19,981.87 and 8,105.90 is: 11,186.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,479.34 : 19,981.87 = 8,105.90 : x
  2. Step 2: Convert to fraction form
    14,479.34/19,981.87 = 8,105.90/x
  3. Step 3: Cross multiply
    14,479.34x = 19,981.87 × 8,105.90
  4. Step 4: Simplify right side
    14,479.34x = 161,970,919.86
  5. Step 5: Solve for x
    x = 161,970,919.86/14,479.34
  6. Step 6: Final answer
    x = 11,186.35

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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.