Home / 20,855.46-28,757.47-13,289.80

Finding the Fourth Proportional to 20,855.46, 28,757.47 and 13,289.80

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Solution

The fourth proportional to 20,855.46, 28,757.47 and 13,289.80 is: 18,325.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.46 : 28,757.47 = 13,289.80 : x
  2. Step 2: Convert to fraction form
    20,855.46/28,757.47 = 13,289.80/x
  3. Step 3: Cross multiply
    20,855.46x = 28,757.47 × 13,289.80
  4. Step 4: Simplify right side
    20,855.46x = 382,181,081.45
  5. Step 5: Solve for x
    x = 382,181,081.45/20,855.46
  6. Step 6: Final answer
    x = 18,325.23

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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.