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Finding the Fourth Proportional to 14,811.88, 20,434.56 and 8,520.88

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Solution

The fourth proportional to 14,811.88, 20,434.56 and 8,520.88 is: 11,755.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,811.88 : 20,434.56 = 8,520.88 : x
  2. Step 2: Convert to fraction form
    14,811.88/20,434.56 = 8,520.88/x
  3. Step 3: Cross multiply
    14,811.88x = 20,434.56 × 8,520.88
  4. Step 4: Simplify right side
    14,811.88x = 174,120,433.61
  5. Step 5: Solve for x
    x = 174,120,433.61/14,811.88
  6. Step 6: Final answer
    x = 11,755.46

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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.