Home / 28,720.89-39,634.45-16,145.64

Finding the Fourth Proportional to 28,720.89, 39,634.45 and 16,145.64

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Solution

The fourth proportional to 28,720.89, 39,634.45 and 16,145.64 is: 22,280.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.89 : 39,634.45 = 16,145.64 : x
  2. Step 2: Convert to fraction form
    28,720.89/39,634.45 = 16,145.64/x
  3. Step 3: Cross multiply
    28,720.89x = 39,634.45 × 16,145.64
  4. Step 4: Simplify right side
    28,720.89x = 639,923,520.93
  5. Step 5: Solve for x
    x = 639,923,520.93/28,720.89
  6. Step 6: Final answer
    x = 22,280.77

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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.