Home / 20,667.30-28,515.88-13,110.87

Finding the Fourth Proportional to 20,667.30, 28,515.88 and 13,110.87

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Solution

The fourth proportional to 20,667.30, 28,515.88 and 13,110.87 is: 18,089.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.30 : 28,515.88 = 13,110.87 : x
  2. Step 2: Convert to fraction form
    20,667.30/28,515.88 = 13,110.87/x
  3. Step 3: Cross multiply
    20,667.30x = 28,515.88 × 13,110.87
  4. Step 4: Simplify right side
    20,667.30x = 373,867,995.62
  5. Step 5: Solve for x
    x = 373,867,995.62/20,667.30
  6. Step 6: Final answer
    x = 18,089.83

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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.