Home / 21,216.90-29,279.28-11,786.34

Finding the Fourth Proportional to 21,216.90, 29,279.28 and 11,786.34

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Solution

The fourth proportional to 21,216.90, 29,279.28 and 11,786.34 is: 16,265.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.90 : 29,279.28 = 11,786.34 : x
  2. Step 2: Convert to fraction form
    21,216.90/29,279.28 = 11,786.34/x
  3. Step 3: Cross multiply
    21,216.90x = 29,279.28 × 11,786.34
  4. Step 4: Simplify right side
    21,216.90x = 345,095,549.04
  5. Step 5: Solve for x
    x = 345,095,549.04/21,216.90
  6. Step 6: Final answer
    x = 16,265.13

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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.