Home / 21,906.86-30,231.47-11,835.29

Finding the Fourth Proportional to 21,906.86, 30,231.47 and 11,835.29

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Solution

The fourth proportional to 21,906.86, 30,231.47 and 11,835.29 is: 16,332.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.86 : 30,231.47 = 11,835.29 : x
  2. Step 2: Convert to fraction form
    21,906.86/30,231.47 = 11,835.29/x
  3. Step 3: Cross multiply
    21,906.86x = 30,231.47 × 11,835.29
  4. Step 4: Simplify right side
    21,906.86x = 357,798,319.74
  5. Step 5: Solve for x
    x = 357,798,319.74/21,906.86
  6. Step 6: Final answer
    x = 16,332.71

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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.