Home / 28,640.85-39,515.43-16,539.78

Finding the Fourth Proportional to 28,640.85, 39,515.43 and 16,539.78

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Solution

The fourth proportional to 28,640.85, 39,515.43 and 16,539.78 is: 22,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.85 : 39,515.43 = 16,539.78 : x
  2. Step 2: Convert to fraction form
    28,640.85/39,515.43 = 16,539.78/x
  3. Step 3: Cross multiply
    28,640.85x = 39,515.43 × 16,539.78
  4. Step 4: Simplify right side
    28,640.85x = 653,576,518.81
  5. Step 5: Solve for x
    x = 653,576,518.81/28,640.85
  6. Step 6: Final answer
    x = 22,819.73

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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.