Home / 20,975.21-28,945.77-11,544.38

Finding the Fourth Proportional to 20,975.21, 28,945.77 and 11,544.38

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Solution

The fourth proportional to 20,975.21, 28,945.77 and 11,544.38 is: 15,931.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.21 : 28,945.77 = 11,544.38 : x
  2. Step 2: Convert to fraction form
    20,975.21/28,945.77 = 11,544.38/x
  3. Step 3: Cross multiply
    20,975.21x = 28,945.77 × 11,544.38
  4. Step 4: Simplify right side
    20,975.21x = 334,160,968.27
  5. Step 5: Solve for x
    x = 334,160,968.27/20,975.21
  6. Step 6: Final answer
    x = 15,931.23

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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.