Home / 20,319.09-28,042.71-11,821.58

Finding the Fourth Proportional to 20,319.09, 28,042.71 and 11,821.58

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Solution

The fourth proportional to 20,319.09, 28,042.71 and 11,821.58 is: 16,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.09 : 28,042.71 = 11,821.58 : x
  2. Step 2: Convert to fraction form
    20,319.09/28,042.71 = 11,821.58/x
  3. Step 3: Cross multiply
    20,319.09x = 28,042.71 × 11,821.58
  4. Step 4: Simplify right side
    20,319.09x = 331,508,999.47
  5. Step 5: Solve for x
    x = 331,508,999.47/20,319.09
  6. Step 6: Final answer
    x = 16,315.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.