Home / 18,930.72-28,395.84-6,447.36

Finding the Fourth Proportional to 18,930.72, 28,395.84 and 6,447.36

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Solution

The fourth proportional to 18,930.72, 28,395.84 and 6,447.36 is: 9,670.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.72 : 28,395.84 = 6,447.36 : x
  2. Step 2: Convert to fraction form
    18,930.72/28,395.84 = 6,447.36/x
  3. Step 3: Cross multiply
    18,930.72x = 28,395.84 × 6,447.36
  4. Step 4: Simplify right side
    18,930.72x = 183,078,202.98
  5. Step 5: Solve for x
    x = 183,078,202.98/18,930.72
  6. Step 6: Final answer
    x = 9,670.96

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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.