Home / 20,682.72-28,543.32-11,251.08

Finding the Fourth Proportional to 20,682.72, 28,543.32 and 11,251.08

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Solution

The fourth proportional to 20,682.72, 28,543.32 and 11,251.08 is: 15,527.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.72 : 28,543.32 = 11,251.08 : x
  2. Step 2: Convert to fraction form
    20,682.72/28,543.32 = 11,251.08/x
  3. Step 3: Cross multiply
    20,682.72x = 28,543.32 × 11,251.08
  4. Step 4: Simplify right side
    20,682.72x = 321,143,176.79
  5. Step 5: Solve for x
    x = 321,143,176.79/20,682.72
  6. Step 6: Final answer
    x = 15,527.12

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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.