Home / 20,580.80-28,399.86-11,629.08

Finding the Fourth Proportional to 20,580.80, 28,399.86 and 11,629.08

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Solution

The fourth proportional to 20,580.80, 28,399.86 and 11,629.08 is: 16,047.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.80 : 28,399.86 = 11,629.08 : x
  2. Step 2: Convert to fraction form
    20,580.80/28,399.86 = 11,629.08/x
  3. Step 3: Cross multiply
    20,580.80x = 28,399.86 × 11,629.08
  4. Step 4: Simplify right side
    20,580.80x = 330,264,243.93
  5. Step 5: Solve for x
    x = 330,264,243.93/20,580.80
  6. Step 6: Final answer
    x = 16,047.21

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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.