Home / 13,418.30-20,103.15-10,939.70

Finding the Fourth Proportional to 13,418.30, 20,103.15 and 10,939.70

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Solution

The fourth proportional to 13,418.30, 20,103.15 and 10,939.70 is: 16,389.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.30 : 20,103.15 = 10,939.70 : x
  2. Step 2: Convert to fraction form
    13,418.30/20,103.15 = 10,939.70/x
  3. Step 3: Cross multiply
    13,418.30x = 20,103.15 × 10,939.70
  4. Step 4: Simplify right side
    13,418.30x = 219,922,430.06
  5. Step 5: Solve for x
    x = 219,922,430.06/13,418.30
  6. Step 6: Final answer
    x = 16,389.74

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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.