Home / 20,739.07-28,620.03-11,307.43

Finding the Fourth Proportional to 20,739.07, 28,620.03 and 11,307.43

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Solution

The fourth proportional to 20,739.07, 28,620.03 and 11,307.43 is: 15,604.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.07 : 28,620.03 = 11,307.43 : x
  2. Step 2: Convert to fraction form
    20,739.07/28,620.03 = 11,307.43/x
  3. Step 3: Cross multiply
    20,739.07x = 28,620.03 × 11,307.43
  4. Step 4: Simplify right side
    20,739.07x = 323,618,985.82
  5. Step 5: Solve for x
    x = 323,618,985.82/20,739.07
  6. Step 6: Final answer
    x = 15,604.32

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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.