Home / 21,190.15-29,243.78-12,238.03

Finding the Fourth Proportional to 21,190.15, 29,243.78 and 12,238.03

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Solution

The fourth proportional to 21,190.15, 29,243.78 and 12,238.03 is: 16,889.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.15 : 29,243.78 = 12,238.03 : x
  2. Step 2: Convert to fraction form
    21,190.15/29,243.78 = 12,238.03/x
  3. Step 3: Cross multiply
    21,190.15x = 29,243.78 × 12,238.03
  4. Step 4: Simplify right side
    21,190.15x = 357,886,256.95
  5. Step 5: Solve for x
    x = 357,886,256.95/21,190.15
  6. Step 6: Final answer
    x = 16,889.27

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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.