Home / 20,633.99-28,475.21-11,202.55

Finding the Fourth Proportional to 20,633.99, 28,475.21 and 11,202.55

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Solution

The fourth proportional to 20,633.99, 28,475.21 and 11,202.55 is: 15,459.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.99 : 28,475.21 = 11,202.55 : x
  2. Step 2: Convert to fraction form
    20,633.99/28,475.21 = 11,202.55/x
  3. Step 3: Cross multiply
    20,633.99x = 28,475.21 × 11,202.55
  4. Step 4: Simplify right side
    20,633.99x = 318,994,920.60
  5. Step 5: Solve for x
    x = 318,994,920.60/20,633.99
  6. Step 6: Final answer
    x = 15,459.69

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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.