Home / 30,350.07-41,862.15-20,139.21

Finding the Fourth Proportional to 30,350.07, 41,862.15 and 20,139.21

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Solution

The fourth proportional to 30,350.07, 41,862.15 and 20,139.21 is: 27,778.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,350.07 : 41,862.15 = 20,139.21 : x
  2. Step 2: Convert to fraction form
    30,350.07/41,862.15 = 20,139.21/x
  3. Step 3: Cross multiply
    30,350.07x = 41,862.15 × 20,139.21
  4. Step 4: Simplify right side
    30,350.07x = 843,070,629.90
  5. Step 5: Solve for x
    x = 843,070,629.90/30,350.07
  6. Step 6: Final answer
    x = 27,778.21

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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.