Home / 20,757.81-28,642.89-11,804.32

Finding the Fourth Proportional to 20,757.81, 28,642.89 and 11,804.32

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Solution

The fourth proportional to 20,757.81, 28,642.89 and 11,804.32 is: 16,288.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.81 : 28,642.89 = 11,804.32 : x
  2. Step 2: Convert to fraction form
    20,757.81/28,642.89 = 11,804.32/x
  3. Step 3: Cross multiply
    20,757.81x = 28,642.89 × 11,804.32
  4. Step 4: Simplify right side
    20,757.81x = 338,109,839.28
  5. Step 5: Solve for x
    x = 338,109,839.28/20,757.81
  6. Step 6: Final answer
    x = 16,288.32

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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.