Home / 28,961.97-39,971.25-16,220.00

Finding the Fourth Proportional to 28,961.97, 39,971.25 and 16,220.00

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Solution

The fourth proportional to 28,961.97, 39,971.25 and 16,220.00 is: 22,385.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,961.97 : 39,971.25 = 16,220.00 : x
  2. Step 2: Convert to fraction form
    28,961.97/39,971.25 = 16,220.00/x
  3. Step 3: Cross multiply
    28,961.97x = 39,971.25 × 16,220.00
  4. Step 4: Simplify right side
    28,961.97x = 648,333,475.14
  5. Step 5: Solve for x
    x = 648,333,475.14/28,961.97
  6. Step 6: Final answer
    x = 22,385.68

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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.