Home / 20,343.51-28,072.69-11,389.50

Finding the Fourth Proportional to 20,343.51, 28,072.69 and 11,389.50

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Solution

The fourth proportional to 20,343.51, 28,072.69 and 11,389.50 is: 15,716.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.51 : 28,072.69 = 11,389.50 : x
  2. Step 2: Convert to fraction form
    20,343.51/28,072.69 = 11,389.50/x
  3. Step 3: Cross multiply
    20,343.51x = 28,072.69 × 11,389.50
  4. Step 4: Simplify right side
    20,343.51x = 319,733,874.28
  5. Step 5: Solve for x
    x = 319,733,874.28/20,343.51
  6. Step 6: Final answer
    x = 15,716.75

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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.