Home / 28,379.76-39,163.68-15,804.60

Finding the Fourth Proportional to 28,379.76, 39,163.68 and 15,804.60

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Solution

The fourth proportional to 28,379.76, 39,163.68 and 15,804.60 is: 21,810.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.76 : 39,163.68 = 15,804.60 : x
  2. Step 2: Convert to fraction form
    28,379.76/39,163.68 = 15,804.60/x
  3. Step 3: Cross multiply
    28,379.76x = 39,163.68 × 15,804.60
  4. Step 4: Simplify right side
    28,379.76x = 618,966,296.93
  5. Step 5: Solve for x
    x = 618,966,296.93/28,379.76
  6. Step 6: Final answer
    x = 21,810.13

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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.