Home / 18,930.85-28,390.80-6,450.59

Finding the Fourth Proportional to 18,930.85, 28,390.80 and 6,450.59

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Solution

The fourth proportional to 18,930.85, 28,390.80 and 6,450.59 is: 9,674.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.85 : 28,390.80 = 6,450.59 : x
  2. Step 2: Convert to fraction form
    18,930.85/28,390.80 = 6,450.59/x
  3. Step 3: Cross multiply
    18,930.85x = 28,390.80 × 6,450.59
  4. Step 4: Simplify right side
    18,930.85x = 183,137,378.32
  5. Step 5: Solve for x
    x = 183,137,378.32/18,930.85
  6. Step 6: Final answer
    x = 9,674.02

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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.