Home / 28,308.40-39,067.77-16,978.33

Finding the Fourth Proportional to 28,308.40, 39,067.77 and 16,978.33

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Solution

The fourth proportional to 28,308.40, 39,067.77 and 16,978.33 is: 23,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,308.40 : 39,067.77 = 16,978.33 : x
  2. Step 2: Convert to fraction form
    28,308.40/39,067.77 = 16,978.33/x
  3. Step 3: Cross multiply
    28,308.40x = 39,067.77 × 16,978.33
  4. Step 4: Simplify right side
    28,308.40x = 663,305,491.42
  5. Step 5: Solve for x
    x = 663,305,491.42/28,308.40
  6. Step 6: Final answer
    x = 23,431.40

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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.