Home / 20,120.10-27,767.40-11,168.52

Finding the Fourth Proportional to 20,120.10, 27,767.40 and 11,168.52

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Solution

The fourth proportional to 20,120.10, 27,767.40 and 11,168.52 is: 15,413.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.10 : 27,767.40 = 11,168.52 : x
  2. Step 2: Convert to fraction form
    20,120.10/27,767.40 = 11,168.52/x
  3. Step 3: Cross multiply
    20,120.10x = 27,767.40 × 11,168.52
  4. Step 4: Simplify right side
    20,120.10x = 310,120,762.25
  5. Step 5: Solve for x
    x = 310,120,762.25/20,120.10
  6. Step 6: Final answer
    x = 15,413.48

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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.