Home / 20,605.36-31,019.43-18,768.28

Finding the Fourth Proportional to 20,605.36, 31,019.43 and 18,768.28

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Solution

The fourth proportional to 20,605.36, 31,019.43 and 18,768.28 is: 28,253.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.36 : 31,019.43 = 18,768.28 : x
  2. Step 2: Convert to fraction form
    20,605.36/31,019.43 = 18,768.28/x
  3. Step 3: Cross multiply
    20,605.36x = 31,019.43 × 18,768.28
  4. Step 4: Simplify right side
    20,605.36x = 582,181,347.68
  5. Step 5: Solve for x
    x = 582,181,347.68/20,605.36
  6. Step 6: Final answer
    x = 28,253.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.