Home / 21,327.37-29,424.67-13,778.78

Finding the Fourth Proportional to 21,327.37, 29,424.67 and 13,778.78

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Solution

The fourth proportional to 21,327.37, 29,424.67 and 13,778.78 is: 19,010.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.37 : 29,424.67 = 13,778.78 : x
  2. Step 2: Convert to fraction form
    21,327.37/29,424.67 = 13,778.78/x
  3. Step 3: Cross multiply
    21,327.37x = 29,424.67 × 13,778.78
  4. Step 4: Simplify right side
    21,327.37x = 405,435,872.93
  5. Step 5: Solve for x
    x = 405,435,872.93/21,327.37
  6. Step 6: Final answer
    x = 19,010.12

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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.