Home / 20,720.72-28,571.94-13,994.67

Finding the Fourth Proportional to 20,720.72, 28,571.94 and 13,994.67

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Solution

The fourth proportional to 20,720.72, 28,571.94 and 13,994.67 is: 19,297.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.72 : 28,571.94 = 13,994.67 : x
  2. Step 2: Convert to fraction form
    20,720.72/28,571.94 = 13,994.67/x
  3. Step 3: Cross multiply
    20,720.72x = 28,571.94 × 13,994.67
  4. Step 4: Simplify right side
    20,720.72x = 399,854,978.70
  5. Step 5: Solve for x
    x = 399,854,978.70/20,720.72
  6. Step 6: Final answer
    x = 19,297.35

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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.