Home / 20,680.35-28,538.90-11,727.89

Finding the Fourth Proportional to 20,680.35, 28,538.90 and 11,727.89

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Solution

The fourth proportional to 20,680.35, 28,538.90 and 11,727.89 is: 16,184.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.35 : 28,538.90 = 11,727.89 : x
  2. Step 2: Convert to fraction form
    20,680.35/28,538.90 = 11,727.89/x
  3. Step 3: Cross multiply
    20,680.35x = 28,538.90 × 11,727.89
  4. Step 4: Simplify right side
    20,680.35x = 334,701,079.92
  5. Step 5: Solve for x
    x = 334,701,079.92/20,680.35
  6. Step 6: Final answer
    x = 16,184.50

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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.