Home / 20,620.86-28,455.06-11,666.31

Finding the Fourth Proportional to 20,620.86, 28,455.06 and 11,666.31

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Solution

The fourth proportional to 20,620.86, 28,455.06 and 11,666.31 is: 16,098.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.86 : 28,455.06 = 11,666.31 : x
  2. Step 2: Convert to fraction form
    20,620.86/28,455.06 = 11,666.31/x
  3. Step 3: Cross multiply
    20,620.86x = 28,455.06 × 11,666.31
  4. Step 4: Simplify right side
    20,620.86x = 331,965,551.03
  5. Step 5: Solve for x
    x = 331,965,551.03/20,620.86
  6. Step 6: Final answer
    x = 16,098.53

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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.