Home / 28,843.90-39,745.49-21,278.19

Finding the Fourth Proportional to 28,843.90, 39,745.49 and 21,278.19

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Solution

The fourth proportional to 28,843.90, 39,745.49 and 21,278.19 is: 29,320.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,843.90 : 39,745.49 = 21,278.19 : x
  2. Step 2: Convert to fraction form
    28,843.90/39,745.49 = 21,278.19/x
  3. Step 3: Cross multiply
    28,843.90x = 39,745.49 × 21,278.19
  4. Step 4: Simplify right side
    28,843.90x = 845,712,130.52
  5. Step 5: Solve for x
    x = 845,712,130.52/28,843.90
  6. Step 6: Final answer
    x = 29,320.31

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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.