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Finding the Fourth Proportional to 13,603.40, 18,771.40 and 7,633.90

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Solution

The fourth proportional to 13,603.40, 18,771.40 and 7,633.90 is: 10,534.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.40 : 18,771.40 = 7,633.90 : x
  2. Step 2: Convert to fraction form
    13,603.40/18,771.40 = 7,633.90/x
  3. Step 3: Cross multiply
    13,603.40x = 18,771.40 × 7,633.90
  4. Step 4: Simplify right side
    13,603.40x = 143,298,924.45
  5. Step 5: Solve for x
    x = 143,298,924.45/13,603.40
  6. Step 6: Final answer
    x = 10,534.06

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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.