Home / 20,866.88-28,796.31-11,435.46

Finding the Fourth Proportional to 20,866.88, 28,796.31 and 11,435.46

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Solution

The fourth proportional to 20,866.88, 28,796.31 and 11,435.46 is: 15,780.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.88 : 28,796.31 = 11,435.46 : x
  2. Step 2: Convert to fraction form
    20,866.88/28,796.31 = 11,435.46/x
  3. Step 3: Cross multiply
    20,866.88x = 28,796.31 × 11,435.46
  4. Step 4: Simplify right side
    20,866.88x = 329,299,051.15
  5. Step 5: Solve for x
    x = 329,299,051.15/20,866.88
  6. Step 6: Final answer
    x = 15,780.94

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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.