Home / 21,042.80-29,164.47-20,649.14

Finding the Fourth Proportional to 21,042.80, 29,164.47 and 20,649.14

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Solution

The fourth proportional to 21,042.80, 29,164.47 and 20,649.14 is: 28,618.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.80 : 29,164.47 = 20,649.14 : x
  2. Step 2: Convert to fraction form
    21,042.80/29,164.47 = 20,649.14/x
  3. Step 3: Cross multiply
    21,042.80x = 29,164.47 × 20,649.14
  4. Step 4: Simplify right side
    21,042.80x = 602,220,974.99
  5. Step 5: Solve for x
    x = 602,220,974.99/21,042.80
  6. Step 6: Final answer
    x = 28,618.87

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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.