Home / 18,812.20-28,215.69-13,172.77

Finding the Fourth Proportional to 18,812.20, 28,215.69 and 13,172.77

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Solution

The fourth proportional to 18,812.20, 28,215.69 and 13,172.77 is: 19,757.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.20 : 28,215.69 = 13,172.77 : x
  2. Step 2: Convert to fraction form
    18,812.20/28,215.69 = 13,172.77/x
  3. Step 3: Cross multiply
    18,812.20x = 28,215.69 × 13,172.77
  4. Step 4: Simplify right side
    18,812.20x = 371,678,794.76
  5. Step 5: Solve for x
    x = 371,678,794.76/18,812.20
  6. Step 6: Final answer
    x = 19,757.33

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1.5x scale

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.