Home / 21,080.12-31,638.36-11,729.48

Finding the Fourth Proportional to 21,080.12, 31,638.36 and 11,729.48

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Solution

The fourth proportional to 21,080.12, 31,638.36 and 11,729.48 is: 17,604.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.12 : 31,638.36 = 11,729.48 : x
  2. Step 2: Convert to fraction form
    21,080.12/31,638.36 = 11,729.48/x
  3. Step 3: Cross multiply
    21,080.12x = 31,638.36 × 11,729.48
  4. Step 4: Simplify right side
    21,080.12x = 371,101,510.85
  5. Step 5: Solve for x
    x = 371,101,510.85/21,080.12
  6. Step 6: Final answer
    x = 17,604.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.