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Finding the Fourth Proportional to 13,454.55, 18,539.19 and 12,520.22

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Solution

The fourth proportional to 13,454.55, 18,539.19 and 12,520.22 is: 17,251.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,454.55 : 18,539.19 = 12,520.22 : x
  2. Step 2: Convert to fraction form
    13,454.55/18,539.19 = 12,520.22/x
  3. Step 3: Cross multiply
    13,454.55x = 18,539.19 × 12,520.22
  4. Step 4: Simplify right side
    13,454.55x = 232,114,644.73
  5. Step 5: Solve for x
    x = 232,114,644.73/13,454.55
  6. Step 6: Final answer
    x = 17,251.76

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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.