Home / 21,100.40-29,118.48-11,668.76

Finding the Fourth Proportional to 21,100.40, 29,118.48 and 11,668.76

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Solution

The fourth proportional to 21,100.40, 29,118.48 and 11,668.76 is: 16,102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.40 : 29,118.48 = 11,668.76 : x
  2. Step 2: Convert to fraction form
    21,100.40/29,118.48 = 11,668.76/x
  3. Step 3: Cross multiply
    21,100.40x = 29,118.48 × 11,668.76
  4. Step 4: Simplify right side
    21,100.40x = 339,776,554.68
  5. Step 5: Solve for x
    x = 339,776,554.68/21,100.40
  6. Step 6: Final answer
    x = 16,102.85

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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.