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Finding the Fourth Proportional to 13,107.70, 18,087.06 and 7,440.40

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Solution

The fourth proportional to 13,107.70, 18,087.06 and 7,440.40 is: 10,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.70 : 18,087.06 = 7,440.40 : x
  2. Step 2: Convert to fraction form
    13,107.70/18,087.06 = 7,440.40/x
  3. Step 3: Cross multiply
    13,107.70x = 18,087.06 × 7,440.40
  4. Step 4: Simplify right side
    13,107.70x = 134,574,961.22
  5. Step 5: Solve for x
    x = 134,574,961.22/13,107.70
  6. Step 6: Final answer
    x = 10,266.86

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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.