Home / 21,388.37-29,515.10-11,827.63

Finding the Fourth Proportional to 21,388.37, 29,515.10 and 11,827.63

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Solution

The fourth proportional to 21,388.37, 29,515.10 and 11,827.63 is: 16,321.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.37 : 29,515.10 = 11,827.63 : x
  2. Step 2: Convert to fraction form
    21,388.37/29,515.10 = 11,827.63/x
  3. Step 3: Cross multiply
    21,388.37x = 29,515.10 × 11,827.63
  4. Step 4: Simplify right side
    21,388.37x = 349,093,741.22
  5. Step 5: Solve for x
    x = 349,093,741.22/21,388.37
  6. Step 6: Final answer
    x = 16,321.66

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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.