Home / 20,629.67-28,462.42-12,129.08

Finding the Fourth Proportional to 20,629.67, 28,462.42 and 12,129.08

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Solution

The fourth proportional to 20,629.67, 28,462.42 and 12,129.08 is: 16,734.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.67 : 28,462.42 = 12,129.08 : x
  2. Step 2: Convert to fraction form
    20,629.67/28,462.42 = 12,129.08/x
  3. Step 3: Cross multiply
    20,629.67x = 28,462.42 × 12,129.08
  4. Step 4: Simplify right side
    20,629.67x = 345,222,969.17
  5. Step 5: Solve for x
    x = 345,222,969.17/20,629.67
  6. Step 6: Final answer
    x = 16,734.29

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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.