Home / 21,388.72-29,515.20-11,828.05

Finding the Fourth Proportional to 21,388.72, 29,515.20 and 11,828.05

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Solution

The fourth proportional to 21,388.72, 29,515.20 and 11,828.05 is: 16,322.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.72 : 29,515.20 = 11,828.05 : x
  2. Step 2: Convert to fraction form
    21,388.72/29,515.20 = 11,828.05/x
  3. Step 3: Cross multiply
    21,388.72x = 29,515.20 × 11,828.05
  4. Step 4: Simplify right side
    21,388.72x = 349,107,261.36
  5. Step 5: Solve for x
    x = 349,107,261.36/21,388.72
  6. Step 6: Final answer
    x = 16,322.03

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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.