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Finding the Fourth Proportional to 13,118.50, 18,103 and 7,150.04

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Solution

The fourth proportional to 13,118.50, 18,103 and 7,150.04 is: 9,866.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.50 : 18,103 = 7,150.04 : x
  2. Step 2: Convert to fraction form
    13,118.50/18,103 = 7,150.04/x
  3. Step 3: Cross multiply
    13,118.50x = 18,103 × 7,150.04
  4. Step 4: Simplify right side
    13,118.50x = 129,437,174.12
  5. Step 5: Solve for x
    x = 129,437,174.12/13,118.50
  6. Step 6: Final answer
    x = 9,866.77

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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.