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Finding the Fourth Proportional to 13,214.00, 18,235.51 and 7,907.78

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Solution

The fourth proportional to 13,214.00, 18,235.51 and 7,907.78 is: 10,912.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,214.00 : 18,235.51 = 7,907.78 : x
  2. Step 2: Convert to fraction form
    13,214.00/18,235.51 = 7,907.78/x
  3. Step 3: Cross multiply
    13,214.00x = 18,235.51 × 7,907.78
  4. Step 4: Simplify right side
    13,214.00x = 144,202,427.09
  5. Step 5: Solve for x
    x = 144,202,427.09/13,214.00
  6. Step 6: Final answer
    x = 10,912.85

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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.