Home / 20,938.86-28,895.30-11,507.22

Finding the Fourth Proportional to 20,938.86, 28,895.30 and 11,507.22

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Solution

The fourth proportional to 20,938.86, 28,895.30 and 11,507.22 is: 15,879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.86 : 28,895.30 = 11,507.22 : x
  2. Step 2: Convert to fraction form
    20,938.86/28,895.30 = 11,507.22/x
  3. Step 3: Cross multiply
    20,938.86x = 28,895.30 × 11,507.22
  4. Step 4: Simplify right side
    20,938.86x = 332,504,574.07
  5. Step 5: Solve for x
    x = 332,504,574.07/20,938.86
  6. Step 6: Final answer
    x = 15,879.78

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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.