Home / 28,355.34-39,064.86-20,383.78

Finding the Fourth Proportional to 28,355.34, 39,064.86 and 20,383.78

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Solution

The fourth proportional to 28,355.34, 39,064.86 and 20,383.78 is: 28,082.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.34 : 39,064.86 = 20,383.78 : x
  2. Step 2: Convert to fraction form
    28,355.34/39,064.86 = 20,383.78/x
  3. Step 3: Cross multiply
    28,355.34x = 39,064.86 × 20,383.78
  4. Step 4: Simplify right side
    28,355.34x = 796,289,511.97
  5. Step 5: Solve for x
    x = 796,289,511.97/28,355.34
  6. Step 6: Final answer
    x = 28,082.52

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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.