Home / 20,866.14-28,795.70-11,435.31

Finding the Fourth Proportional to 20,866.14, 28,795.70 and 11,435.31

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Solution

The fourth proportional to 20,866.14, 28,795.70 and 11,435.31 is: 15,780.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.14 : 28,795.70 = 11,435.31 : x
  2. Step 2: Convert to fraction form
    20,866.14/28,795.70 = 11,435.31/x
  3. Step 3: Cross multiply
    20,866.14x = 28,795.70 × 11,435.31
  4. Step 4: Simplify right side
    20,866.14x = 329,287,784.76
  5. Step 5: Solve for x
    x = 329,287,784.76/20,866.14
  6. Step 6: Final answer
    x = 15,780.96

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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.