Home / 13,489.90-20,236.68-12,669.76

Finding the Fourth Proportional to 13,489.90, 20,236.68 and 12,669.76

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Solution

The fourth proportional to 13,489.90, 20,236.68 and 12,669.76 is: 19,006.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.90 : 20,236.68 = 12,669.76 : x
  2. Step 2: Convert to fraction form
    13,489.90/20,236.68 = 12,669.76/x
  3. Step 3: Cross multiply
    13,489.90x = 20,236.68 × 12,669.76
  4. Step 4: Simplify right side
    13,489.90x = 256,393,878.80
  5. Step 5: Solve for x
    x = 256,393,878.80/13,489.90
  6. Step 6: Final answer
    x = 19,006.36

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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.