Home / 20,814.72-28,724.13-11,383.35

Finding the Fourth Proportional to 20,814.72, 28,724.13 and 11,383.35

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Solution

The fourth proportional to 20,814.72, 28,724.13 and 11,383.35 is: 15,708.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.72 : 28,724.13 = 11,383.35 : x
  2. Step 2: Convert to fraction form
    20,814.72/28,724.13 = 11,383.35/x
  3. Step 3: Cross multiply
    20,814.72x = 28,724.13 × 11,383.35
  4. Step 4: Simplify right side
    20,814.72x = 326,976,825.24
  5. Step 5: Solve for x
    x = 326,976,825.24/20,814.72
  6. Step 6: Final answer
    x = 15,708.92

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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.