Home / 21,042.29-29,163.77-20,648.63

Finding the Fourth Proportional to 21,042.29, 29,163.77 and 20,648.63

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Solution

The fourth proportional to 21,042.29, 29,163.77 and 20,648.63 is: 28,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.29 : 29,163.77 = 20,648.63 : x
  2. Step 2: Convert to fraction form
    21,042.29/29,163.77 = 20,648.63/x
  3. Step 3: Cross multiply
    21,042.29x = 29,163.77 × 20,648.63
  4. Step 4: Simplify right side
    21,042.29x = 602,192,020.67
  5. Step 5: Solve for x
    x = 602,192,020.67/21,042.29
  6. Step 6: Final answer
    x = 28,618.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.