Home / 20,814.51-28,724.45-11,383.68

Finding the Fourth Proportional to 20,814.51, 28,724.45 and 11,383.68

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Solution

The fourth proportional to 20,814.51, 28,724.45 and 11,383.68 is: 15,709.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.51 : 28,724.45 = 11,383.68 : x
  2. Step 2: Convert to fraction form
    20,814.51/28,724.45 = 11,383.68/x
  3. Step 3: Cross multiply
    20,814.51x = 28,724.45 × 11,383.68
  4. Step 4: Simplify right side
    20,814.51x = 326,989,890.06
  5. Step 5: Solve for x
    x = 326,989,890.06/20,814.51
  6. Step 6: Final answer
    x = 15,709.71

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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.