Home / 18,490.56-27,720-12,629.76

Finding the Fourth Proportional to 18,490.56, 27,720 and 12,629.76

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Solution

The fourth proportional to 18,490.56, 27,720 and 12,629.76 is: 18,933.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,490.56 : 27,720 = 12,629.76 : x
  2. Step 2: Convert to fraction form
    18,490.56/27,720 = 12,629.76/x
  3. Step 3: Cross multiply
    18,490.56x = 27,720 × 12,629.76
  4. Step 4: Simplify right side
    18,490.56x = 350,096,947.20
  5. Step 5: Solve for x
    x = 350,096,947.20/18,490.56
  6. Step 6: Final answer
    x = 18,933.82

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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.