Home / 18,985.41-28,480.39-7,899.59

Finding the Fourth Proportional to 18,985.41, 28,480.39 and 7,899.59

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Solution

The fourth proportional to 18,985.41, 28,480.39 and 7,899.59 is: 11,850.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.41 : 28,480.39 = 7,899.59 : x
  2. Step 2: Convert to fraction form
    18,985.41/28,480.39 = 7,899.59/x
  3. Step 3: Cross multiply
    18,985.41x = 28,480.39 × 7,899.59
  4. Step 4: Simplify right side
    18,985.41x = 224,983,455.49
  5. Step 5: Solve for x
    x = 224,983,455.49/18,985.41
  6. Step 6: Final answer
    x = 11,850.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.