Home / 20,603.88-28,433.30-11,172.38

Finding the Fourth Proportional to 20,603.88, 28,433.30 and 11,172.38

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Solution

The fourth proportional to 20,603.88, 28,433.30 and 11,172.38 is: 15,417.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.88 : 28,433.30 = 11,172.38 : x
  2. Step 2: Convert to fraction form
    20,603.88/28,433.30 = 11,172.38/x
  3. Step 3: Cross multiply
    20,603.88x = 28,433.30 × 11,172.38
  4. Step 4: Simplify right side
    20,603.88x = 317,667,434.23
  5. Step 5: Solve for x
    x = 317,667,434.23/20,603.88
  6. Step 6: Final answer
    x = 15,417.85

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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.