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Finding the Fourth Proportional to 18,501.39, 25,534.71 and 11,790

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Solution

The fourth proportional to 18,501.39, 25,534.71 and 11,790 is: 16,271.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,501.39 : 25,534.71 = 11,790 : x
  2. Step 2: Convert to fraction form
    18,501.39/25,534.71 = 11,790/x
  3. Step 3: Cross multiply
    18,501.39x = 25,534.71 × 11,790
  4. Step 4: Simplify right side
    18,501.39x = 301,054,230.90
  5. Step 5: Solve for x
    x = 301,054,230.90/18,501.39
  6. Step 6: Final answer
    x = 16,271.98

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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.