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Finding the Fourth Proportional to 5,509.70, 7,603.40 and 2,991.82

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Solution

The fourth proportional to 5,509.70, 7,603.40 and 2,991.82 is: 4,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,509.70 : 7,603.40 = 2,991.82 : x
  2. Step 2: Convert to fraction form
    5,509.70/7,603.40 = 2,991.82/x
  3. Step 3: Cross multiply
    5,509.70x = 7,603.40 × 2,991.82
  4. Step 4: Simplify right side
    5,509.70x = 22,747,951.21
  5. Step 5: Solve for x
    x = 22,747,951.21/5,509.70
  6. Step 6: Final answer
    x = 4,128.71

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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.