Home / 28,969.85-39,975.05-16,221.26

Finding the Fourth Proportional to 28,969.85, 39,975.05 and 16,221.26

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Solution

The fourth proportional to 28,969.85, 39,975.05 and 16,221.26 is: 22,383.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969.85 : 39,975.05 = 16,221.26 : x
  2. Step 2: Convert to fraction form
    28,969.85/39,975.05 = 16,221.26/x
  3. Step 3: Cross multiply
    28,969.85x = 39,975.05 × 16,221.26
  4. Step 4: Simplify right side
    28,969.85x = 648,445,820.05
  5. Step 5: Solve for x
    x = 648,445,820.05/28,969.85
  6. Step 6: Final answer
    x = 22,383.47

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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.