Home / 20,667.17-28,515.70-13,110.75

Finding the Fourth Proportional to 20,667.17, 28,515.70 and 13,110.75

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Solution

The fourth proportional to 20,667.17, 28,515.70 and 13,110.75 is: 18,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.17 : 28,515.70 = 13,110.75 : x
  2. Step 2: Convert to fraction form
    20,667.17/28,515.70 = 13,110.75/x
  3. Step 3: Cross multiply
    20,667.17x = 28,515.70 × 13,110.75
  4. Step 4: Simplify right side
    20,667.17x = 373,862,213.78
  5. Step 5: Solve for x
    x = 373,862,213.78/20,667.17
  6. Step 6: Final answer
    x = 18,089.67

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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.