Home / 28,961.25-39,969-16,388.43

Finding the Fourth Proportional to 28,961.25, 39,969 and 16,388.43

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Solution

The fourth proportional to 28,961.25, 39,969 and 16,388.43 is: 22,617.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,961.25 : 39,969 = 16,388.43 : x
  2. Step 2: Convert to fraction form
    28,961.25/39,969 = 16,388.43/x
  3. Step 3: Cross multiply
    28,961.25x = 39,969 × 16,388.43
  4. Step 4: Simplify right side
    28,961.25x = 655,029,158.67
  5. Step 5: Solve for x
    x = 655,029,158.67/28,961.25
  6. Step 6: Final answer
    x = 22,617.43

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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.