Home / 18,788.09-28,186.45-5,640.71

Finding the Fourth Proportional to 18,788.09, 28,186.45 and 5,640.71

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Solution

The fourth proportional to 18,788.09, 28,186.45 and 5,640.71 is: 8,462.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.09 : 28,186.45 = 5,640.71 : x
  2. Step 2: Convert to fraction form
    18,788.09/28,186.45 = 5,640.71/x
  3. Step 3: Cross multiply
    18,788.09x = 28,186.45 × 5,640.71
  4. Step 4: Simplify right side
    18,788.09x = 158,991,435.35
  5. Step 5: Solve for x
    x = 158,991,435.35/18,788.09
  6. Step 6: Final answer
    x = 8,462.35

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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.