Home / 20,785.25-31,176.93-7,636.66

Finding the Fourth Proportional to 20,785.25, 31,176.93 and 7,636.66

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Solution

The fourth proportional to 20,785.25, 31,176.93 and 7,636.66 is: 11,454.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.25 : 31,176.93 = 7,636.66 : x
  2. Step 2: Convert to fraction form
    20,785.25/31,176.93 = 7,636.66/x
  3. Step 3: Cross multiply
    20,785.25x = 31,176.93 × 7,636.66
  4. Step 4: Simplify right side
    20,785.25x = 238,087,564.95
  5. Step 5: Solve for x
    x = 238,087,564.95/20,785.25
  6. Step 6: Final answer
    x = 11,454.64

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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.