Home / 28,918.66-39,891.81-19,970.86

Finding the Fourth Proportional to 28,918.66, 39,891.81 and 19,970.86

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Solution

The fourth proportional to 28,918.66, 39,891.81 and 19,970.86 is: 27,548.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.66 : 39,891.81 = 19,970.86 : x
  2. Step 2: Convert to fraction form
    28,918.66/39,891.81 = 19,970.86/x
  3. Step 3: Cross multiply
    28,918.66x = 39,891.81 × 19,970.86
  4. Step 4: Simplify right side
    28,918.66x = 796,673,752.66
  5. Step 5: Solve for x
    x = 796,673,752.66/28,918.66
  6. Step 6: Final answer
    x = 27,548.78

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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.