Home / 28,720.62-39,634.25-16,145.37

Finding the Fourth Proportional to 28,720.62, 39,634.25 and 16,145.37

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Solution

The fourth proportional to 28,720.62, 39,634.25 and 16,145.37 is: 22,280.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.62 : 39,634.25 = 16,145.37 : x
  2. Step 2: Convert to fraction form
    28,720.62/39,634.25 = 16,145.37/x
  3. Step 3: Cross multiply
    28,720.62x = 39,634.25 × 16,145.37
  4. Step 4: Simplify right side
    28,720.62x = 639,909,550.20
  5. Step 5: Solve for x
    x = 639,909,550.20/28,720.62
  6. Step 6: Final answer
    x = 22,280.49

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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.