Home / 20,343.09-28,070.19-11,390.97

Finding the Fourth Proportional to 20,343.09, 28,070.19 and 11,390.97

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Solution

The fourth proportional to 20,343.09, 28,070.19 and 11,390.97 is: 15,717.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.09 : 28,070.19 = 11,390.97 : x
  2. Step 2: Convert to fraction form
    20,343.09/28,070.19 = 11,390.97/x
  3. Step 3: Cross multiply
    20,343.09x = 28,070.19 × 11,390.97
  4. Step 4: Simplify right side
    20,343.09x = 319,746,692.18
  5. Step 5: Solve for x
    x = 319,746,692.18/20,343.09
  6. Step 6: Final answer
    x = 15,717.71

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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.