Home / 7,189.20-9,921.36-4,045.68

Finding the Fourth Proportional to 7,189.20, 9,921.36 and 4,045.68

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Solution

The fourth proportional to 7,189.20, 9,921.36 and 4,045.68 is: 5,583.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.20 : 9,921.36 = 4,045.68 : x
  2. Step 2: Convert to fraction form
    7,189.20/9,921.36 = 4,045.68/x
  3. Step 3: Cross multiply
    7,189.20x = 9,921.36 × 4,045.68
  4. Step 4: Simplify right side
    7,189.20x = 40,138,647.72
  5. Step 5: Solve for x
    x = 40,138,647.72/7,189.20
  6. Step 6: Final answer
    x = 5,583.19

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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.