Home / 20,840.32-28,759.62-11,409.22

Finding the Fourth Proportional to 20,840.32, 28,759.62 and 11,409.22

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Solution

The fourth proportional to 20,840.32, 28,759.62 and 11,409.22 is: 15,744.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.32 : 28,759.62 = 11,409.22 : x
  2. Step 2: Convert to fraction form
    20,840.32/28,759.62 = 11,409.22/x
  3. Step 3: Cross multiply
    20,840.32x = 28,759.62 × 11,409.22
  4. Step 4: Simplify right side
    20,840.32x = 328,124,831.70
  5. Step 5: Solve for x
    x = 328,124,831.70/20,840.32
  6. Step 6: Final answer
    x = 15,744.71

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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.