Home / 12,591.45-18,887.58-5,190.89

Finding the Fourth Proportional to 12,591.45, 18,887.58 and 5,190.89

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Solution

The fourth proportional to 12,591.45, 18,887.58 and 5,190.89 is: 7,786.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.45 : 18,887.58 = 5,190.89 : x
  2. Step 2: Convert to fraction form
    12,591.45/18,887.58 = 5,190.89/x
  3. Step 3: Cross multiply
    12,591.45x = 18,887.58 × 5,190.89
  4. Step 4: Simplify right side
    12,591.45x = 98,043,255.71
  5. Step 5: Solve for x
    x = 98,043,255.71/12,591.45
  6. Step 6: Final answer
    x = 7,786.49

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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.