Home / 5,128.24-7,685.88-4,431.64

Finding the Fourth Proportional to 5,128.24, 7,685.88 and 4,431.64

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Solution

The fourth proportional to 5,128.24, 7,685.88 and 4,431.64 is: 6,641.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.24 : 7,685.88 = 4,431.64 : x
  2. Step 2: Convert to fraction form
    5,128.24/7,685.88 = 4,431.64/x
  3. Step 3: Cross multiply
    5,128.24x = 7,685.88 × 4,431.64
  4. Step 4: Simplify right side
    5,128.24x = 34,061,053.24
  5. Step 5: Solve for x
    x = 34,061,053.24/5,128.24
  6. Step 6: Final answer
    x = 6,641.86

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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.