Home / 18,716.57-28,070.72-5,386.61

Finding the Fourth Proportional to 18,716.57, 28,070.72 and 5,386.61

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Solution

The fourth proportional to 18,716.57, 28,070.72 and 5,386.61 is: 8,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.57 : 28,070.72 = 5,386.61 : x
  2. Step 2: Convert to fraction form
    18,716.57/28,070.72 = 5,386.61/x
  3. Step 3: Cross multiply
    18,716.57x = 28,070.72 × 5,386.61
  4. Step 4: Simplify right side
    18,716.57x = 151,205,853.77
  5. Step 5: Solve for x
    x = 151,205,853.77/18,716.57
  6. Step 6: Final answer
    x = 8,078.72

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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.