Home / 20,995.79-31,340.07-18,504.75

Finding the Fourth Proportional to 20,995.79, 31,340.07 and 18,504.75

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Solution

The fourth proportional to 20,995.79, 31,340.07 and 18,504.75 is: 27,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.79 : 31,340.07 = 18,504.75 : x
  2. Step 2: Convert to fraction form
    20,995.79/31,340.07 = 18,504.75/x
  3. Step 3: Cross multiply
    20,995.79x = 31,340.07 × 18,504.75
  4. Step 4: Simplify right side
    20,995.79x = 579,940,160.33
  5. Step 5: Solve for x
    x = 579,940,160.33/20,995.79
  6. Step 6: Final answer
    x = 27,621.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.