Home / 21,864.44-30,138-14,778.56

Finding the Fourth Proportional to 21,864.44, 30,138 and 14,778.56

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Solution

The fourth proportional to 21,864.44, 30,138 and 14,778.56 is: 20,370.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.44 : 30,138 = 14,778.56 : x
  2. Step 2: Convert to fraction form
    21,864.44/30,138 = 14,778.56/x
  3. Step 3: Cross multiply
    21,864.44x = 30,138 × 14,778.56
  4. Step 4: Simplify right side
    21,864.44x = 445,396,241.28
  5. Step 5: Solve for x
    x = 445,396,241.28/21,864.44
  6. Step 6: Final answer
    x = 20,370.80

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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.