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Finding the Fourth Proportional to 13,603.14, 20,407.95 and 7,369.38

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Solution

The fourth proportional to 13,603.14, 20,407.95 and 7,369.38 is: 11,055.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.14 : 20,407.95 = 7,369.38 : x
  2. Step 2: Convert to fraction form
    13,603.14/20,407.95 = 7,369.38/x
  3. Step 3: Cross multiply
    13,603.14x = 20,407.95 × 7,369.38
  4. Step 4: Simplify right side
    13,603.14x = 150,393,938.57
  5. Step 5: Solve for x
    x = 150,393,938.57/13,603.14
  6. Step 6: Final answer
    x = 11,055.83

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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.