Home / 28,515.83-39,351.15-15,768.68

Finding the Fourth Proportional to 28,515.83, 39,351.15 and 15,768.68

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Solution

The fourth proportional to 28,515.83, 39,351.15 and 15,768.68 is: 21,760.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.83 : 39,351.15 = 15,768.68 : x
  2. Step 2: Convert to fraction form
    28,515.83/39,351.15 = 15,768.68/x
  3. Step 3: Cross multiply
    28,515.83x = 39,351.15 × 15,768.68
  4. Step 4: Simplify right side
    28,515.83x = 620,515,495.23
  5. Step 5: Solve for x
    x = 620,515,495.23/28,515.83
  6. Step 6: Final answer
    x = 21,760.39

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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.