Home / 20,791.08-28,688.22-11,838.72

Finding the Fourth Proportional to 20,791.08, 28,688.22 and 11,838.72

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Solution

The fourth proportional to 20,791.08, 28,688.22 and 11,838.72 is: 16,335.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.08 : 28,688.22 = 11,838.72 : x
  2. Step 2: Convert to fraction form
    20,791.08/28,688.22 = 11,838.72/x
  3. Step 3: Cross multiply
    20,791.08x = 28,688.22 × 11,838.72
  4. Step 4: Simplify right side
    20,791.08x = 339,631,803.88
  5. Step 5: Solve for x
    x = 339,631,803.88/20,791.08
  6. Step 6: Final answer
    x = 16,335.46

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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.