Home / 20,680.49-28,539.41-11,727.81

Finding the Fourth Proportional to 20,680.49, 28,539.41 and 11,727.81

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Solution

The fourth proportional to 20,680.49, 28,539.41 and 11,727.81 is: 16,184.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.49 : 28,539.41 = 11,727.81 : x
  2. Step 2: Convert to fraction form
    20,680.49/28,539.41 = 11,727.81/x
  3. Step 3: Cross multiply
    20,680.49x = 28,539.41 × 11,727.81
  4. Step 4: Simplify right side
    20,680.49x = 334,704,719.35
  5. Step 5: Solve for x
    x = 334,704,719.35/20,680.49
  6. Step 6: Final answer
    x = 16,184.56

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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.