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Finding the Fourth Proportional to 14,811.79, 20,442.19 and 8,440.69

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Solution

The fourth proportional to 14,811.79, 20,442.19 and 8,440.69 is: 11,649.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,811.79 : 20,442.19 = 8,440.69 : x
  2. Step 2: Convert to fraction form
    14,811.79/20,442.19 = 8,440.69/x
  3. Step 3: Cross multiply
    14,811.79x = 20,442.19 × 8,440.69
  4. Step 4: Simplify right side
    14,811.79x = 172,546,086.50
  5. Step 5: Solve for x
    x = 172,546,086.50/14,811.79
  6. Step 6: Final answer
    x = 11,649.24

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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.