Home / 20,910.24-28,859.04-12,954.72

Finding the Fourth Proportional to 20,910.24, 28,859.04 and 12,954.72

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Solution

The fourth proportional to 20,910.24, 28,859.04 and 12,954.72 is: 17,879.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.24 : 28,859.04 = 12,954.72 : x
  2. Step 2: Convert to fraction form
    20,910.24/28,859.04 = 12,954.72/x
  3. Step 3: Cross multiply
    20,910.24x = 28,859.04 × 12,954.72
  4. Step 4: Simplify right side
    20,910.24x = 373,860,782.67
  5. Step 5: Solve for x
    x = 373,860,782.67/20,910.24
  6. Step 6: Final answer
    x = 17,879.32

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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.