Home / 13,620.09-20,430.90-4,855

Finding the Fourth Proportional to 13,620.09, 20,430.90 and 4,855

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Solution

The fourth proportional to 13,620.09, 20,430.90 and 4,855 is: 7,282.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.09 : 20,430.90 = 4,855 : x
  2. Step 2: Convert to fraction form
    13,620.09/20,430.90 = 4,855/x
  3. Step 3: Cross multiply
    13,620.09x = 20,430.90 × 4,855
  4. Step 4: Simplify right side
    13,620.09x = 99,192,019.50
  5. Step 5: Solve for x
    x = 99,192,019.50/13,620.09
  6. Step 6: Final answer
    x = 7,282.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.