Home / 20,628.25-28,467.16-12,130.54

Finding the Fourth Proportional to 20,628.25, 28,467.16 and 12,130.54

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Solution

The fourth proportional to 20,628.25, 28,467.16 and 12,130.54 is: 16,740.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.25 : 28,467.16 = 12,130.54 : x
  2. Step 2: Convert to fraction form
    20,628.25/28,467.16 = 12,130.54/x
  3. Step 3: Cross multiply
    20,628.25x = 28,467.16 × 12,130.54
  4. Step 4: Simplify right side
    20,628.25x = 345,321,921.57
  5. Step 5: Solve for x
    x = 345,321,921.57/20,628.25
  6. Step 6: Final answer
    x = 16,740.25

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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.