Home / 28,379.48-39,163.74-15,804.68

Finding the Fourth Proportional to 28,379.48, 39,163.74 and 15,804.68

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Solution

The fourth proportional to 28,379.48, 39,163.74 and 15,804.68 is: 21,810.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.48 : 39,163.74 = 15,804.68 : x
  2. Step 2: Convert to fraction form
    28,379.48/39,163.74 = 15,804.68/x
  3. Step 3: Cross multiply
    28,379.48x = 39,163.74 × 15,804.68
  4. Step 4: Simplify right side
    28,379.48x = 618,970,378.30
  5. Step 5: Solve for x
    x = 618,970,378.30/28,379.48
  6. Step 6: Final answer
    x = 21,810.49

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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.