Home / 12,586.21-18,887.79-5,190.50

Finding the Fourth Proportional to 12,586.21, 18,887.79 and 5,190.50

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Solution

The fourth proportional to 12,586.21, 18,887.79 and 5,190.50 is: 7,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.21 : 18,887.79 = 5,190.50 : x
  2. Step 2: Convert to fraction form
    12,586.21/18,887.79 = 5,190.50/x
  3. Step 3: Cross multiply
    12,586.21x = 18,887.79 × 5,190.50
  4. Step 4: Simplify right side
    12,586.21x = 98,037,140.68
  5. Step 5: Solve for x
    x = 98,037,140.68/12,586.21
  6. Step 6: Final answer
    x = 7,789.25

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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.