Home / 20,928.86-31,393.29-9,239.75

Finding the Fourth Proportional to 20,928.86, 31,393.29 and 9,239.75

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Solution

The fourth proportional to 20,928.86, 31,393.29 and 9,239.75 is: 13,859.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.86 : 31,393.29 = 9,239.75 : x
  2. Step 2: Convert to fraction form
    20,928.86/31,393.29 = 9,239.75/x
  3. Step 3: Cross multiply
    20,928.86x = 31,393.29 × 9,239.75
  4. Step 4: Simplify right side
    20,928.86x = 290,066,151.28
  5. Step 5: Solve for x
    x = 290,066,151.28/20,928.86
  6. Step 6: Final answer
    x = 13,859.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.