Home / 28,745.70-39,669-16,170.45

Finding the Fourth Proportional to 28,745.70, 39,669 and 16,170.45

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Solution

The fourth proportional to 28,745.70, 39,669 and 16,170.45 is: 22,315.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,745.70 : 39,669 = 16,170.45 : x
  2. Step 2: Convert to fraction form
    28,745.70/39,669 = 16,170.45/x
  3. Step 3: Cross multiply
    28,745.70x = 39,669 × 16,170.45
  4. Step 4: Simplify right side
    28,745.70x = 641,465,581.05
  5. Step 5: Solve for x
    x = 641,465,581.05/28,745.70
  6. Step 6: Final answer
    x = 22,315.18

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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.