Home / 20,661.75-28,513.01-11,230.35

Finding the Fourth Proportional to 20,661.75, 28,513.01 and 11,230.35

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Solution

The fourth proportional to 20,661.75, 28,513.01 and 11,230.35 is: 15,497.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.75 : 28,513.01 = 11,230.35 : x
  2. Step 2: Convert to fraction form
    20,661.75/28,513.01 = 11,230.35/x
  3. Step 3: Cross multiply
    20,661.75x = 28,513.01 × 11,230.35
  4. Step 4: Simplify right side
    20,661.75x = 320,211,025.70
  5. Step 5: Solve for x
    x = 320,211,025.70/20,661.75
  6. Step 6: Final answer
    x = 15,497.77

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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.