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Finding the Fourth Proportional to 18,289.08, 25,238.97 and 9,905.58

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Solution

The fourth proportional to 18,289.08, 25,238.97 and 9,905.58 is: 13,669.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.08 : 25,238.97 = 9,905.58 : x
  2. Step 2: Convert to fraction form
    18,289.08/25,238.97 = 9,905.58/x
  3. Step 3: Cross multiply
    18,289.08x = 25,238.97 × 9,905.58
  4. Step 4: Simplify right side
    18,289.08x = 250,006,636.45
  5. Step 5: Solve for x
    x = 250,006,636.45/18,289.08
  6. Step 6: Final answer
    x = 13,669.72

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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.