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Finding the Fourth Proportional to 18,347.65, 25,330.26 and 12,078.25

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Solution

The fourth proportional to 18,347.65, 25,330.26 and 12,078.25 is: 16,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,347.65 : 25,330.26 = 12,078.25 : x
  2. Step 2: Convert to fraction form
    18,347.65/25,330.26 = 12,078.25/x
  3. Step 3: Cross multiply
    18,347.65x = 25,330.26 × 12,078.25
  4. Step 4: Simplify right side
    18,347.65x = 305,945,212.85
  5. Step 5: Solve for x
    x = 305,945,212.85/18,347.65
  6. Step 6: Final answer
    x = 16,674.90

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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.