Home / 20,603.99-28,433.53-11,172.56

Finding the Fourth Proportional to 20,603.99, 28,433.53 and 11,172.56

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Solution

The fourth proportional to 20,603.99, 28,433.53 and 11,172.56 is: 15,418.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.99 : 28,433.53 = 11,172.56 : x
  2. Step 2: Convert to fraction form
    20,603.99/28,433.53 = 11,172.56/x
  3. Step 3: Cross multiply
    20,603.99x = 28,433.53 × 11,172.56
  4. Step 4: Simplify right side
    20,603.99x = 317,675,149.84
  5. Step 5: Solve for x
    x = 317,675,149.84/20,603.99
  6. Step 6: Final answer
    x = 15,418.14

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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.