Home / 20,343.09-28,072.22-11,389.08

Finding the Fourth Proportional to 20,343.09, 28,072.22 and 11,389.08

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Solution

The fourth proportional to 20,343.09, 28,072.22 and 11,389.08 is: 15,716.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.09 : 28,072.22 = 11,389.08 : x
  2. Step 2: Convert to fraction form
    20,343.09/28,072.22 = 11,389.08/x
  3. Step 3: Cross multiply
    20,343.09x = 28,072.22 × 11,389.08
  4. Step 4: Simplify right side
    20,343.09x = 319,716,702.41
  5. Step 5: Solve for x
    x = 319,716,702.41/20,343.09
  6. Step 6: Final answer
    x = 15,716.23

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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.