Home / 20,318.09-28,038.69-11,365.56

Finding the Fourth Proportional to 20,318.09, 28,038.69 and 11,365.56

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Solution

The fourth proportional to 20,318.09, 28,038.69 and 11,365.56 is: 15,684.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.09 : 28,038.69 = 11,365.56 : x
  2. Step 2: Convert to fraction form
    20,318.09/28,038.69 = 11,365.56/x
  3. Step 3: Cross multiply
    20,318.09x = 28,038.69 × 11,365.56
  4. Step 4: Simplify right side
    20,318.09x = 318,675,413.52
  5. Step 5: Solve for x
    x = 318,675,413.52/20,318.09
  6. Step 6: Final answer
    x = 15,684.32

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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.