Home / 13,690.89-20,538.35-4,328.79

Finding the Fourth Proportional to 13,690.89, 20,538.35 and 4,328.79

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Solution

The fourth proportional to 13,690.89, 20,538.35 and 4,328.79 is: 6,493.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.89 : 20,538.35 = 4,328.79 : x
  2. Step 2: Convert to fraction form
    13,690.89/20,538.35 = 4,328.79/x
  3. Step 3: Cross multiply
    13,690.89x = 20,538.35 × 4,328.79
  4. Step 4: Simplify right side
    13,690.89x = 88,906,204.10
  5. Step 5: Solve for x
    x = 88,906,204.10/13,690.89
  6. Step 6: Final answer
    x = 6,493.82

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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.