Home / 13,690.12-20,536.30-4,330.78

Finding the Fourth Proportional to 13,690.12, 20,536.30 and 4,330.78

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Solution

The fourth proportional to 13,690.12, 20,536.30 and 4,330.78 is: 6,496.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.12 : 20,536.30 = 4,330.78 : x
  2. Step 2: Convert to fraction form
    13,690.12/20,536.30 = 4,330.78/x
  3. Step 3: Cross multiply
    13,690.12x = 20,536.30 × 4,330.78
  4. Step 4: Simplify right side
    13,690.12x = 88,938,197.31
  5. Step 5: Solve for x
    x = 88,938,197.31/13,690.12
  6. Step 6: Final answer
    x = 6,496.52

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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.