Home / 20,860.07-28,789.64-11,905.52

Finding the Fourth Proportional to 20,860.07, 28,789.64 and 11,905.52

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Solution

The fourth proportional to 20,860.07, 28,789.64 and 11,905.52 is: 16,431.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.07 : 28,789.64 = 11,905.52 : x
  2. Step 2: Convert to fraction form
    20,860.07/28,789.64 = 11,905.52/x
  3. Step 3: Cross multiply
    20,860.07x = 28,789.64 × 11,905.52
  4. Step 4: Simplify right side
    20,860.07x = 342,755,431.34
  5. Step 5: Solve for x
    x = 342,755,431.34/20,860.07
  6. Step 6: Final answer
    x = 16,431.18

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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.