Home / 21,170.27-29,205.52-13,615.17

Finding the Fourth Proportional to 21,170.27, 29,205.52 and 13,615.17

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Solution

The fourth proportional to 21,170.27, 29,205.52 and 13,615.17 is: 18,782.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.27 : 29,205.52 = 13,615.17 : x
  2. Step 2: Convert to fraction form
    21,170.27/29,205.52 = 13,615.17/x
  3. Step 3: Cross multiply
    21,170.27x = 29,205.52 × 13,615.17
  4. Step 4: Simplify right side
    21,170.27x = 397,638,085.70
  5. Step 5: Solve for x
    x = 397,638,085.70/21,170.27
  6. Step 6: Final answer
    x = 18,782.86

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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.