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Finding the Fourth Proportional to 13,568.76, 18,724.94 and 7,907.40

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Solution

The fourth proportional to 13,568.76, 18,724.94 and 7,907.40 is: 10,912.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,568.76 : 18,724.94 = 7,907.40 : x
  2. Step 2: Convert to fraction form
    13,568.76/18,724.94 = 7,907.40/x
  3. Step 3: Cross multiply
    13,568.76x = 18,724.94 × 7,907.40
  4. Step 4: Simplify right side
    13,568.76x = 148,065,590.56
  5. Step 5: Solve for x
    x = 148,065,590.56/13,568.76
  6. Step 6: Final answer
    x = 10,912.24

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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.