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Finding the Fourth Proportional to 13,620.69, 18,795.54 and 7,653.35

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Solution

The fourth proportional to 13,620.69, 18,795.54 and 7,653.35 is: 10,561.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.69 : 18,795.54 = 7,653.35 : x
  2. Step 2: Convert to fraction form
    13,620.69/18,795.54 = 7,653.35/x
  3. Step 3: Cross multiply
    13,620.69x = 18,795.54 × 7,653.35
  4. Step 4: Simplify right side
    13,620.69x = 143,848,846.06
  5. Step 5: Solve for x
    x = 143,848,846.06/13,620.69
  6. Step 6: Final answer
    x = 10,561.05

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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.