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Finding the Fourth Proportional to 9,355.70, 12,912.36 and 7,113.98

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Solution

The fourth proportional to 9,355.70, 12,912.36 and 7,113.98 is: 9,818.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,355.70 : 12,912.36 = 7,113.98 : x
  2. Step 2: Convert to fraction form
    9,355.70/12,912.36 = 7,113.98/x
  3. Step 3: Cross multiply
    9,355.70x = 12,912.36 × 7,113.98
  4. Step 4: Simplify right side
    9,355.70x = 91,858,270.79
  5. Step 5: Solve for x
    x = 91,858,270.79/9,355.70
  6. Step 6: Final answer
    x = 9,818.43

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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.