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Finding the Fourth Proportional to 13,603.75, 18,774.01 and 7,635.42

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Solution

The fourth proportional to 13,603.75, 18,774.01 and 7,635.42 is: 10,537.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.75 : 18,774.01 = 7,635.42 : x
  2. Step 2: Convert to fraction form
    13,603.75/18,774.01 = 7,635.42/x
  3. Step 3: Cross multiply
    13,603.75x = 18,774.01 × 7,635.42
  4. Step 4: Simplify right side
    13,603.75x = 143,347,451.43
  5. Step 5: Solve for x
    x = 143,347,451.43/13,603.75
  6. Step 6: Final answer
    x = 10,537.35

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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.