Home / 20,739-28,620.27-11,307.60

Finding the Fourth Proportional to 20,739, 28,620.27 and 11,307.60

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Solution

The fourth proportional to 20,739, 28,620.27 and 11,307.60 is: 15,604.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739 : 28,620.27 = 11,307.60 : x
  2. Step 2: Convert to fraction form
    20,739/28,620.27 = 11,307.60/x
  3. Step 3: Cross multiply
    20,739x = 28,620.27 × 11,307.60
  4. Step 4: Simplify right side
    20,739x = 323,626,565.05
  5. Step 5: Solve for x
    x = 323,626,565.05/20,739
  6. Step 6: Final answer
    x = 15,604.73

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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.