Home / 28,396.35-39,187.77-15,821.10

Finding the Fourth Proportional to 28,396.35, 39,187.77 and 15,821.10

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Solution

The fourth proportional to 28,396.35, 39,187.77 and 15,821.10 is: 21,833.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396.35 : 39,187.77 = 15,821.10 : x
  2. Step 2: Convert to fraction form
    28,396.35/39,187.77 = 15,821.10/x
  3. Step 3: Cross multiply
    28,396.35x = 39,187.77 × 15,821.10
  4. Step 4: Simplify right side
    28,396.35x = 619,993,627.95
  5. Step 5: Solve for x
    x = 619,993,627.95/28,396.35
  6. Step 6: Final answer
    x = 21,833.57

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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.