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Finding the Fourth Proportional to 18,214.80, 25,137.36 and 11,139

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Solution

The fourth proportional to 18,214.80, 25,137.36 and 11,139 is: 15,372.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,214.80 : 25,137.36 = 11,139 : x
  2. Step 2: Convert to fraction form
    18,214.80/25,137.36 = 11,139/x
  3. Step 3: Cross multiply
    18,214.80x = 25,137.36 × 11,139
  4. Step 4: Simplify right side
    18,214.80x = 280,005,053.04
  5. Step 5: Solve for x
    x = 280,005,053.04/18,214.80
  6. Step 6: Final answer
    x = 15,372.39

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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.