Home / 20,808.13-28,715.21-13,369.09

Finding the Fourth Proportional to 20,808.13, 28,715.21 and 13,369.09

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Solution

The fourth proportional to 20,808.13, 28,715.21 and 13,369.09 is: 18,449.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.13 : 28,715.21 = 13,369.09 : x
  2. Step 2: Convert to fraction form
    20,808.13/28,715.21 = 13,369.09/x
  3. Step 3: Cross multiply
    20,808.13x = 28,715.21 × 13,369.09
  4. Step 4: Simplify right side
    20,808.13x = 383,896,226.86
  5. Step 5: Solve for x
    x = 383,896,226.86/20,808.13
  6. Step 6: Final answer
    x = 18,449.34

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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.