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Finding the Fourth Proportional to 13,907.79, 19,193.09 and 7,620.21

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Solution

The fourth proportional to 13,907.79, 19,193.09 and 7,620.21 is: 10,516.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.79 : 19,193.09 = 7,620.21 : x
  2. Step 2: Convert to fraction form
    13,907.79/19,193.09 = 7,620.21/x
  3. Step 3: Cross multiply
    13,907.79x = 19,193.09 × 7,620.21
  4. Step 4: Simplify right side
    13,907.79x = 146,255,338.25
  5. Step 5: Solve for x
    x = 146,255,338.25/13,907.79
  6. Step 6: Final answer
    x = 10,516.07

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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.