Home / 18,708.27-28,065.78-5,380.62

Finding the Fourth Proportional to 18,708.27, 28,065.78 and 5,380.62

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Solution

The fourth proportional to 18,708.27, 28,065.78 and 5,380.62 is: 8,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.27 : 28,065.78 = 5,380.62 : x
  2. Step 2: Convert to fraction form
    18,708.27/28,065.78 = 5,380.62/x
  3. Step 3: Cross multiply
    18,708.27x = 28,065.78 × 5,380.62
  4. Step 4: Simplify right side
    18,708.27x = 151,011,297.18
  5. Step 5: Solve for x
    x = 151,011,297.18/18,708.27
  6. Step 6: Final answer
    x = 8,071.90

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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.