Home / 20,933.54-31,394.22-7,782.78

Finding the Fourth Proportional to 20,933.54, 31,394.22 and 7,782.78

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Solution

The fourth proportional to 20,933.54, 31,394.22 and 7,782.78 is: 11,671.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.54 : 31,394.22 = 7,782.78 : x
  2. Step 2: Convert to fraction form
    20,933.54/31,394.22 = 7,782.78/x
  3. Step 3: Cross multiply
    20,933.54x = 31,394.22 × 7,782.78
  4. Step 4: Simplify right side
    20,933.54x = 244,334,307.53
  5. Step 5: Solve for x
    x = 244,334,307.53/20,933.54
  6. Step 6: Final answer
    x = 11,671.91

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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.