Home / 12,143.54-18,219.90-4,753.28

Finding the Fourth Proportional to 12,143.54, 18,219.90 and 4,753.28

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Solution

The fourth proportional to 12,143.54, 18,219.90 and 4,753.28 is: 7,131.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.54 : 18,219.90 = 4,753.28 : x
  2. Step 2: Convert to fraction form
    12,143.54/18,219.90 = 4,753.28/x
  3. Step 3: Cross multiply
    12,143.54x = 18,219.90 × 4,753.28
  4. Step 4: Simplify right side
    12,143.54x = 86,604,286.27
  5. Step 5: Solve for x
    x = 86,604,286.27/12,143.54
  6. Step 6: Final answer
    x = 7,131.72

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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.