Home / 20,851.81-28,769.47-11,776.69

Finding the Fourth Proportional to 20,851.81, 28,769.47 and 11,776.69

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Solution

The fourth proportional to 20,851.81, 28,769.47 and 11,776.69 is: 16,248.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.81 : 28,769.47 = 11,776.69 : x
  2. Step 2: Convert to fraction form
    20,851.81/28,769.47 = 11,776.69/x
  3. Step 3: Cross multiply
    20,851.81x = 28,769.47 × 11,776.69
  4. Step 4: Simplify right side
    20,851.81x = 338,809,194.14
  5. Step 5: Solve for x
    x = 338,809,194.14/20,851.81
  6. Step 6: Final answer
    x = 16,248.43

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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.