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Finding the Fourth Proportional to 18,603.66, 25,679.79 and 12,318.06

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Solution

The fourth proportional to 18,603.66, 25,679.79 and 12,318.06 is: 17,003.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.66 : 25,679.79 = 12,318.06 : x
  2. Step 2: Convert to fraction form
    18,603.66/25,679.79 = 12,318.06/x
  3. Step 3: Cross multiply
    18,603.66x = 25,679.79 × 12,318.06
  4. Step 4: Simplify right side
    18,603.66x = 316,325,194.01
  5. Step 5: Solve for x
    x = 316,325,194.01/18,603.66
  6. Step 6: Final answer
    x = 17,003.39

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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.