Home / 20,651.90-28,500.45-11,700.50

Finding the Fourth Proportional to 20,651.90, 28,500.45 and 11,700.50

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Solution

The fourth proportional to 20,651.90, 28,500.45 and 11,700.50 is: 16,147.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.90 : 28,500.45 = 11,700.50 : x
  2. Step 2: Convert to fraction form
    20,651.90/28,500.45 = 11,700.50/x
  3. Step 3: Cross multiply
    20,651.90x = 28,500.45 × 11,700.50
  4. Step 4: Simplify right side
    20,651.90x = 333,469,515.23
  5. Step 5: Solve for x
    x = 333,469,515.23/20,651.90
  6. Step 6: Final answer
    x = 16,147.16

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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.