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Finding the Fourth Proportional to 20,603.57, 30,910.02 and 7,455.93

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Solution

The fourth proportional to 20,603.57, 30,910.02 and 7,455.93 is: 11,185.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.57 : 30,910.02 = 7,455.93 : x
  2. Step 2: Convert to fraction form
    20,603.57/30,910.02 = 7,455.93/x
  3. Step 3: Cross multiply
    20,603.57x = 30,910.02 × 7,455.93
  4. Step 4: Simplify right side
    20,603.57x = 230,462,945.42
  5. Step 5: Solve for x
    x = 230,462,945.42/20,603.57
  6. Step 6: Final answer
    x = 11,185.59

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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.