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Finding the Fourth Proportional to 7,415.70, 11,135.70 and 4,961.40

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Solution

The fourth proportional to 7,415.70, 11,135.70 and 4,961.40 is: 7,450.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.70 : 11,135.70 = 4,961.40 : x
  2. Step 2: Convert to fraction form
    7,415.70/11,135.70 = 4,961.40/x
  3. Step 3: Cross multiply
    7,415.70x = 11,135.70 × 4,961.40
  4. Step 4: Simplify right side
    7,415.70x = 55,248,661.98
  5. Step 5: Solve for x
    x = 55,248,661.98/7,415.70
  6. Step 6: Final answer
    x = 7,450.23

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1.5x scale

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.