Home / 7,143.83-9,857.54-3,999.95

Finding the Fourth Proportional to 7,143.83, 9,857.54 and 3,999.95

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Solution

The fourth proportional to 7,143.83, 9,857.54 and 3,999.95 is: 5,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.83 : 9,857.54 = 3,999.95 : x
  2. Step 2: Convert to fraction form
    7,143.83/9,857.54 = 3,999.95/x
  3. Step 3: Cross multiply
    7,143.83x = 9,857.54 × 3,999.95
  4. Step 4: Simplify right side
    7,143.83x = 39,429,647.12
  5. Step 5: Solve for x
    x = 39,429,647.12/7,143.83
  6. Step 6: Final answer
    x = 5,519.40

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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.