Home / 18,920.26-28,351.08-12,999.97

Finding the Fourth Proportional to 18,920.26, 28,351.08 and 12,999.97

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Solution

The fourth proportional to 18,920.26, 28,351.08 and 12,999.97 is: 19,479.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.26 : 28,351.08 = 12,999.97 : x
  2. Step 2: Convert to fraction form
    18,920.26/28,351.08 = 12,999.97/x
  3. Step 3: Cross multiply
    18,920.26x = 28,351.08 × 12,999.97
  4. Step 4: Simplify right side
    18,920.26x = 368,563,189.47
  5. Step 5: Solve for x
    x = 368,563,189.47/18,920.26
  6. Step 6: Final answer
    x = 19,479.82

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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.