Home / 20,906.64-28,851.66-11,475

Finding the Fourth Proportional to 20,906.64, 28,851.66 and 11,475

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Solution

The fourth proportional to 20,906.64, 28,851.66 and 11,475 is: 15,835.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.64 : 28,851.66 = 11,475 : x
  2. Step 2: Convert to fraction form
    20,906.64/28,851.66 = 11,475/x
  3. Step 3: Cross multiply
    20,906.64x = 28,851.66 × 11,475
  4. Step 4: Simplify right side
    20,906.64x = 331,072,798.50
  5. Step 5: Solve for x
    x = 331,072,798.50/20,906.64
  6. Step 6: Final answer
    x = 15,835.77

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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.