Home / 20,866.58-28,796.62-11,435.14

Finding the Fourth Proportional to 20,866.58, 28,796.62 and 11,435.14

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Solution

The fourth proportional to 20,866.58, 28,796.62 and 11,435.14 is: 15,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.58 : 28,796.62 = 11,435.14 : x
  2. Step 2: Convert to fraction form
    20,866.58/28,796.62 = 11,435.14/x
  3. Step 3: Cross multiply
    20,866.58x = 28,796.62 × 11,435.14
  4. Step 4: Simplify right side
    20,866.58x = 329,293,424.63
  5. Step 5: Solve for x
    x = 329,293,424.63/20,866.58
  6. Step 6: Final answer
    x = 15,780.90

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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.