Home / 20,855.16-28,782.20-11,904.02

Finding the Fourth Proportional to 20,855.16, 28,782.20 and 11,904.02

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Solution

The fourth proportional to 20,855.16, 28,782.20 and 11,904.02 is: 16,428.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.16 : 28,782.20 = 11,904.02 : x
  2. Step 2: Convert to fraction form
    20,855.16/28,782.20 = 11,904.02/x
  3. Step 3: Cross multiply
    20,855.16x = 28,782.20 × 11,904.02
  4. Step 4: Simplify right side
    20,855.16x = 342,623,884.44
  5. Step 5: Solve for x
    x = 342,623,884.44/20,855.16
  6. Step 6: Final answer
    x = 16,428.73

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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.