Home / 21,109.74-29,126.97-12,609.60

Finding the Fourth Proportional to 21,109.74, 29,126.97 and 12,609.60

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Solution

The fourth proportional to 21,109.74, 29,126.97 and 12,609.60 is: 17,398.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.74 : 29,126.97 = 12,609.60 : x
  2. Step 2: Convert to fraction form
    21,109.74/29,126.97 = 12,609.60/x
  3. Step 3: Cross multiply
    21,109.74x = 29,126.97 × 12,609.60
  4. Step 4: Simplify right side
    21,109.74x = 367,279,440.91
  5. Step 5: Solve for x
    x = 367,279,440.91/21,109.74
  6. Step 6: Final answer
    x = 17,398.58

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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.