Home / 20,784.05-28,644.89-15,736.17

Finding the Fourth Proportional to 20,784.05, 28,644.89 and 15,736.17

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Solution

The fourth proportional to 20,784.05, 28,644.89 and 15,736.17 is: 21,687.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.05 : 28,644.89 = 15,736.17 : x
  2. Step 2: Convert to fraction form
    20,784.05/28,644.89 = 15,736.17/x
  3. Step 3: Cross multiply
    20,784.05x = 28,644.89 × 15,736.17
  4. Step 4: Simplify right side
    20,784.05x = 450,760,779.99
  5. Step 5: Solve for x
    x = 450,760,779.99/20,784.05
  6. Step 6: Final answer
    x = 21,687.83

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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.