Home / 28,979.72-39,989.32-16,404.47

Finding the Fourth Proportional to 28,979.72, 39,989.32 and 16,404.47

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Solution

The fourth proportional to 28,979.72, 39,989.32 and 16,404.47 is: 22,636.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.72 : 39,989.32 = 16,404.47 : x
  2. Step 2: Convert to fraction form
    28,979.72/39,989.32 = 16,404.47/x
  3. Step 3: Cross multiply
    28,979.72x = 39,989.32 × 16,404.47
  4. Step 4: Simplify right side
    28,979.72x = 656,003,600.26
  5. Step 5: Solve for x
    x = 656,003,600.26/28,979.72
  6. Step 6: Final answer
    x = 22,636.64

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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.