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Finding the Fourth Proportional to 13,690.98, 20,528.25 and 4,326.98

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Solution

The fourth proportional to 13,690.98, 20,528.25 and 4,326.98 is: 6,487.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.98 : 20,528.25 = 4,326.98 : x
  2. Step 2: Convert to fraction form
    13,690.98/20,528.25 = 4,326.98/x
  3. Step 3: Cross multiply
    13,690.98x = 20,528.25 × 4,326.98
  4. Step 4: Simplify right side
    13,690.98x = 88,825,224.54
  5. Step 5: Solve for x
    x = 88,825,224.54/13,690.98
  6. Step 6: Final answer
    x = 6,487.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.