Home / 21,255.99-31,879.41-8,772.77

Finding the Fourth Proportional to 21,255.99, 31,879.41 and 8,772.77

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Solution

The fourth proportional to 21,255.99, 31,879.41 and 8,772.77 is: 13,157.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.99 : 31,879.41 = 8,772.77 : x
  2. Step 2: Convert to fraction form
    21,255.99/31,879.41 = 8,772.77/x
  3. Step 3: Cross multiply
    21,255.99x = 31,879.41 × 8,772.77
  4. Step 4: Simplify right side
    21,255.99x = 279,670,572.27
  5. Step 5: Solve for x
    x = 279,670,572.27/21,255.99
  6. Step 6: Final answer
    x = 13,157.26

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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.