Home / 7,143.72-9,858.60-3,999.93

Finding the Fourth Proportional to 7,143.72, 9,858.60 and 3,999.93

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Solution

The fourth proportional to 7,143.72, 9,858.60 and 3,999.93 is: 5,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.72 : 9,858.60 = 3,999.93 : x
  2. Step 2: Convert to fraction form
    7,143.72/9,858.60 = 3,999.93/x
  3. Step 3: Cross multiply
    7,143.72x = 9,858.60 × 3,999.93
  4. Step 4: Simplify right side
    7,143.72x = 39,433,709.90
  5. Step 5: Solve for x
    x = 39,433,709.90/7,143.72
  6. Step 6: Final answer
    x = 5,520.05

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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.