Home / 18,830.57-28,245.83-7,143.77

Finding the Fourth Proportional to 18,830.57, 28,245.83 and 7,143.77

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Solution

The fourth proportional to 18,830.57, 28,245.83 and 7,143.77 is: 10,715.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.57 : 28,245.83 = 7,143.77 : x
  2. Step 2: Convert to fraction form
    18,830.57/28,245.83 = 7,143.77/x
  3. Step 3: Cross multiply
    18,830.57x = 28,245.83 × 7,143.77
  4. Step 4: Simplify right side
    18,830.57x = 201,781,536.03
  5. Step 5: Solve for x
    x = 201,781,536.03/18,830.57
  6. Step 6: Final answer
    x = 10,715.64

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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.