Home / 18,785.76-28,181.39-5,639.17

Finding the Fourth Proportional to 18,785.76, 28,181.39 and 5,639.17

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Solution

The fourth proportional to 18,785.76, 28,181.39 and 5,639.17 is: 8,459.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.76 : 28,181.39 = 5,639.17 : x
  2. Step 2: Convert to fraction form
    18,785.76/28,181.39 = 5,639.17/x
  3. Step 3: Cross multiply
    18,785.76x = 28,181.39 × 5,639.17
  4. Step 4: Simplify right side
    18,785.76x = 158,919,550.40
  5. Step 5: Solve for x
    x = 158,919,550.40/18,785.76
  6. Step 6: Final answer
    x = 8,459.58

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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.