Home / 7,189.80-9,921.37-4,045.38

Finding the Fourth Proportional to 7,189.80, 9,921.37 and 4,045.38

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Solution

The fourth proportional to 7,189.80, 9,921.37 and 4,045.38 is: 5,582.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.80 : 9,921.37 = 4,045.38 : x
  2. Step 2: Convert to fraction form
    7,189.80/9,921.37 = 4,045.38/x
  3. Step 3: Cross multiply
    7,189.80x = 9,921.37 × 4,045.38
  4. Step 4: Simplify right side
    7,189.80x = 40,135,711.77
  5. Step 5: Solve for x
    x = 40,135,711.77/7,189.80
  6. Step 6: Final answer
    x = 5,582.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.