Home / 21,391.75-29,520.09-12,442.36

Finding the Fourth Proportional to 21,391.75, 29,520.09 and 12,442.36

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Solution

The fourth proportional to 21,391.75, 29,520.09 and 12,442.36 is: 17,170.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.75 : 29,520.09 = 12,442.36 : x
  2. Step 2: Convert to fraction form
    21,391.75/29,520.09 = 12,442.36/x
  3. Step 3: Cross multiply
    21,391.75x = 29,520.09 × 12,442.36
  4. Step 4: Simplify right side
    21,391.75x = 367,299,587.01
  5. Step 5: Solve for x
    x = 367,299,587.01/21,391.75
  6. Step 6: Final answer
    x = 17,170.15

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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.