Home / 5,391.45-7,421.49-4,647.87

Finding the Fourth Proportional to 5,391.45, 7,421.49 and 4,647.87

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Solution

The fourth proportional to 5,391.45, 7,421.49 and 4,647.87 is: 6,397.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.45 : 7,421.49 = 4,647.87 : x
  2. Step 2: Convert to fraction form
    5,391.45/7,421.49 = 4,647.87/x
  3. Step 3: Cross multiply
    5,391.45x = 7,421.49 × 4,647.87
  4. Step 4: Simplify right side
    5,391.45x = 34,494,120.73
  5. Step 5: Solve for x
    x = 34,494,120.73/5,391.45
  6. Step 6: Final answer
    x = 6,397.93

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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.