Home / 20,950.90-28,911.66-11,997.63

Finding the Fourth Proportional to 20,950.90, 28,911.66 and 11,997.63

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Solution

The fourth proportional to 20,950.90, 28,911.66 and 11,997.63 is: 16,556.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.90 : 28,911.66 = 11,997.63 : x
  2. Step 2: Convert to fraction form
    20,950.90/28,911.66 = 11,997.63/x
  3. Step 3: Cross multiply
    20,950.90x = 28,911.66 × 11,997.63
  4. Step 4: Simplify right side
    20,950.90x = 346,871,399.37
  5. Step 5: Solve for x
    x = 346,871,399.37/20,950.90
  6. Step 6: Final answer
    x = 16,556.40

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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.