Home / 20,474.85-28,255.20-11,522.50

Finding the Fourth Proportional to 20,474.85, 28,255.20 and 11,522.50

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Solution

The fourth proportional to 20,474.85, 28,255.20 and 11,522.50 is: 15,900.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.85 : 28,255.20 = 11,522.50 : x
  2. Step 2: Convert to fraction form
    20,474.85/28,255.20 = 11,522.50/x
  3. Step 3: Cross multiply
    20,474.85x = 28,255.20 × 11,522.50
  4. Step 4: Simplify right side
    20,474.85x = 325,570,428.15
  5. Step 5: Solve for x
    x = 325,570,428.15/20,474.85
  6. Step 6: Final answer
    x = 15,900.99

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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.