Home / 7,121.45-10,689.50-5,043.80

Finding the Fourth Proportional to 7,121.45, 10,689.50 and 5,043.80

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Solution

The fourth proportional to 7,121.45, 10,689.50 and 5,043.80 is: 7,570.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.45 : 10,689.50 = 5,043.80 : x
  2. Step 2: Convert to fraction form
    7,121.45/10,689.50 = 5,043.80/x
  3. Step 3: Cross multiply
    7,121.45x = 10,689.50 × 5,043.80
  4. Step 4: Simplify right side
    7,121.45x = 53,915,739.43
  5. Step 5: Solve for x
    x = 53,915,739.43/7,121.45
  6. Step 6: Final answer
    x = 7,570.89

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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.