Home / 20,855.08-28,778.88-11,903.42

Finding the Fourth Proportional to 20,855.08, 28,778.88 and 11,903.42

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Solution

The fourth proportional to 20,855.08, 28,778.88 and 11,903.42 is: 16,426.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.08 : 28,778.88 = 11,903.42 : x
  2. Step 2: Convert to fraction form
    20,855.08/28,778.88 = 11,903.42/x
  3. Step 3: Cross multiply
    20,855.08x = 28,778.88 × 11,903.42
  4. Step 4: Simplify right side
    20,855.08x = 342,567,095.77
  5. Step 5: Solve for x
    x = 342,567,095.77/20,855.08
  6. Step 6: Final answer
    x = 16,426.07

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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.