Home / 21,327.21-29,440.99-13,777.22

Finding the Fourth Proportional to 21,327.21, 29,440.99 and 13,777.22

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Solution

The fourth proportional to 21,327.21, 29,440.99 and 13,777.22 is: 19,018.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.21 : 29,440.99 = 13,777.22 : x
  2. Step 2: Convert to fraction form
    21,327.21/29,440.99 = 13,777.22/x
  3. Step 3: Cross multiply
    21,327.21x = 29,440.99 × 13,777.22
  4. Step 4: Simplify right side
    21,327.21x = 405,614,927.36
  5. Step 5: Solve for x
    x = 405,614,927.36/21,327.21
  6. Step 6: Final answer
    x = 19,018.66

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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.