Home / 20,859.99-28,782.47-11,910.40

Finding the Fourth Proportional to 20,859.99, 28,782.47 and 11,910.40

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Solution

The fourth proportional to 20,859.99, 28,782.47 and 11,910.40 is: 16,433.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.99 : 28,782.47 = 11,910.40 : x
  2. Step 2: Convert to fraction form
    20,859.99/28,782.47 = 11,910.40/x
  3. Step 3: Cross multiply
    20,859.99x = 28,782.47 × 11,910.40
  4. Step 4: Simplify right side
    20,859.99x = 342,810,671.14
  5. Step 5: Solve for x
    x = 342,810,671.14/20,859.99
  6. Step 6: Final answer
    x = 16,433.89

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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.