Home / 21,650.90-29,878.61-12,698.64

Finding the Fourth Proportional to 21,650.90, 29,878.61 and 12,698.64

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Solution

The fourth proportional to 21,650.90, 29,878.61 and 12,698.64 is: 17,524.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,650.90 : 29,878.61 = 12,698.64 : x
  2. Step 2: Convert to fraction form
    21,650.90/29,878.61 = 12,698.64/x
  3. Step 3: Cross multiply
    21,650.90x = 29,878.61 × 12,698.64
  4. Step 4: Simplify right side
    21,650.90x = 379,417,648.60
  5. Step 5: Solve for x
    x = 379,417,648.60/21,650.90
  6. Step 6: Final answer
    x = 17,524.34

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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.