Home / 20,919.50-28,858.77-13,851.84

Finding the Fourth Proportional to 20,919.50, 28,858.77 and 13,851.84

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Solution

The fourth proportional to 20,919.50, 28,858.77 and 13,851.84 is: 19,108.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.50 : 28,858.77 = 13,851.84 : x
  2. Step 2: Convert to fraction form
    20,919.50/28,858.77 = 13,851.84/x
  3. Step 3: Cross multiply
    20,919.50x = 28,858.77 × 13,851.84
  4. Step 4: Simplify right side
    20,919.50x = 399,747,064.64
  5. Step 5: Solve for x
    x = 399,747,064.64/20,919.50
  6. Step 6: Final answer
    x = 19,108.83

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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.