Home / 28,720.99-39,636.98-16,785.64

Finding the Fourth Proportional to 28,720.99, 39,636.98 and 16,785.64

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Solution

The fourth proportional to 28,720.99, 39,636.98 and 16,785.64 is: 23,165.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.99 : 39,636.98 = 16,785.64 : x
  2. Step 2: Convert to fraction form
    28,720.99/39,636.98 = 16,785.64/x
  3. Step 3: Cross multiply
    28,720.99x = 39,636.98 × 16,785.64
  4. Step 4: Simplify right side
    28,720.99x = 665,332,076.97
  5. Step 5: Solve for x
    x = 665,332,076.97/28,720.99
  6. Step 6: Final answer
    x = 23,165.36

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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.