Home / 7,640.10-11,450.58-4,129.98

Finding the Fourth Proportional to 7,640.10, 11,450.58 and 4,129.98

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Solution

The fourth proportional to 7,640.10, 11,450.58 and 4,129.98 is: 6,189.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,640.10 : 11,450.58 = 4,129.98 : x
  2. Step 2: Convert to fraction form
    7,640.10/11,450.58 = 4,129.98/x
  3. Step 3: Cross multiply
    7,640.10x = 11,450.58 × 4,129.98
  4. Step 4: Simplify right side
    7,640.10x = 47,290,666.39
  5. Step 5: Solve for x
    x = 47,290,666.39/7,640.10
  6. Step 6: Final answer
    x = 6,189.80

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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.