Home / 20,927.86-31,391.79-9,238.75

Finding the Fourth Proportional to 20,927.86, 31,391.79 and 9,238.75

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Solution

The fourth proportional to 20,927.86, 31,391.79 and 9,238.75 is: 13,858.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.86 : 31,391.79 = 9,238.75 : x
  2. Step 2: Convert to fraction form
    20,927.86/31,391.79 = 9,238.75/x
  3. Step 3: Cross multiply
    20,927.86x = 31,391.79 × 9,238.75
  4. Step 4: Simplify right side
    20,927.86x = 290,020,786.74
  5. Step 5: Solve for x
    x = 290,020,786.74/20,927.86
  6. Step 6: Final answer
    x = 13,858.12

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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.