Home / 30,469.08-45,708.42-12,939

Finding the Fourth Proportional to 30,469.08, 45,708.42 and 12,939

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Solution

The fourth proportional to 30,469.08, 45,708.42 and 12,939 is: 19,410.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,469.08 : 45,708.42 = 12,939 : x
  2. Step 2: Convert to fraction form
    30,469.08/45,708.42 = 12,939/x
  3. Step 3: Cross multiply
    30,469.08x = 45,708.42 × 12,939
  4. Step 4: Simplify right side
    30,469.08x = 591,421,246.38
  5. Step 5: Solve for x
    x = 591,421,246.38/30,469.08
  6. Step 6: Final answer
    x = 19,410.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.