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Finding the Fourth Proportional to 18,203.40, 25,128.44 and 12,238.53

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Solution

The fourth proportional to 18,203.40, 25,128.44 and 12,238.53 is: 16,894.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,203.40 : 25,128.44 = 12,238.53 : x
  2. Step 2: Convert to fraction form
    18,203.40/25,128.44 = 12,238.53/x
  3. Step 3: Cross multiply
    18,203.40x = 25,128.44 × 12,238.53
  4. Step 4: Simplify right side
    18,203.40x = 307,535,057.26
  5. Step 5: Solve for x
    x = 307,535,057.26/18,203.40
  6. Step 6: Final answer
    x = 16,894.37

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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.