Home / 21,080.50-31,761.26-19,081.60

Finding the Fourth Proportional to 21,080.50, 31,761.26 and 19,081.60

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Solution

The fourth proportional to 21,080.50, 31,761.26 and 19,081.60 is: 28,749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.50 : 31,761.26 = 19,081.60 : x
  2. Step 2: Convert to fraction form
    21,080.50/31,761.26 = 19,081.60/x
  3. Step 3: Cross multiply
    21,080.50x = 31,761.26 × 19,081.60
  4. Step 4: Simplify right side
    21,080.50x = 606,055,658.82
  5. Step 5: Solve for x
    x = 606,055,658.82/21,080.50
  6. Step 6: Final answer
    x = 28,749.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.