Home / 21,298.90-29,383.24-12,680.26

Finding the Fourth Proportional to 21,298.90, 29,383.24 and 12,680.26

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Solution

The fourth proportional to 21,298.90, 29,383.24 and 12,680.26 is: 17,493.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.90 : 29,383.24 = 12,680.26 : x
  2. Step 2: Convert to fraction form
    21,298.90/29,383.24 = 12,680.26/x
  3. Step 3: Cross multiply
    21,298.90x = 29,383.24 × 12,680.26
  4. Step 4: Simplify right side
    21,298.90x = 372,587,234.32
  5. Step 5: Solve for x
    x = 372,587,234.32/21,298.90
  6. Step 6: Final answer
    x = 17,493.26

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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.