Home / 20,995.73-28,976.15-15,681.32

Finding the Fourth Proportional to 20,995.73, 28,976.15 and 15,681.32

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Solution

The fourth proportional to 20,995.73, 28,976.15 and 15,681.32 is: 21,641.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.73 : 28,976.15 = 15,681.32 : x
  2. Step 2: Convert to fraction form
    20,995.73/28,976.15 = 15,681.32/x
  3. Step 3: Cross multiply
    20,995.73x = 28,976.15 × 15,681.32
  4. Step 4: Simplify right side
    20,995.73x = 454,384,057.23
  5. Step 5: Solve for x
    x = 454,384,057.23/20,995.73
  6. Step 6: Final answer
    x = 21,641.74

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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.