Home / 18,910.20-28,368.69-6,429.57

Finding the Fourth Proportional to 18,910.20, 28,368.69 and 6,429.57

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Solution

The fourth proportional to 18,910.20, 28,368.69 and 6,429.57 is: 9,645.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.20 : 28,368.69 = 6,429.57 : x
  2. Step 2: Convert to fraction form
    18,910.20/28,368.69 = 6,429.57/x
  3. Step 3: Cross multiply
    18,910.20x = 28,368.69 × 6,429.57
  4. Step 4: Simplify right side
    18,910.20x = 182,398,446.02
  5. Step 5: Solve for x
    x = 182,398,446.02/18,910.20
  6. Step 6: Final answer
    x = 9,645.51

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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.