Home / 18,520.80-27,748.86-15,420.75

Finding the Fourth Proportional to 18,520.80, 27,748.86 and 15,420.75

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Solution

The fourth proportional to 18,520.80, 27,748.86 and 15,420.75 is: 23,104.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.80 : 27,748.86 = 15,420.75 : x
  2. Step 2: Convert to fraction form
    18,520.80/27,748.86 = 15,420.75/x
  3. Step 3: Cross multiply
    18,520.80x = 27,748.86 × 15,420.75
  4. Step 4: Simplify right side
    18,520.80x = 427,908,232.85
  5. Step 5: Solve for x
    x = 427,908,232.85/18,520.80
  6. Step 6: Final answer
    x = 23,104.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.