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Finding the Fourth Proportional to 13,603.42, 18,770.34 and 7,635.34

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Solution

The fourth proportional to 13,603.42, 18,770.34 and 7,635.34 is: 10,535.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.42 : 18,770.34 = 7,635.34 : x
  2. Step 2: Convert to fraction form
    13,603.42/18,770.34 = 7,635.34/x
  3. Step 3: Cross multiply
    13,603.42x = 18,770.34 × 7,635.34
  4. Step 4: Simplify right side
    13,603.42x = 143,317,927.82
  5. Step 5: Solve for x
    x = 143,317,927.82/13,603.42
  6. Step 6: Final answer
    x = 10,535.43

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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.