Home / 18,437.28-25,439.58-11,720.46

Finding the Fourth Proportional to 18,437.28, 25,439.58 and 11,720.46

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Solution

The fourth proportional to 18,437.28, 25,439.58 and 11,720.46 is: 16,171.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,437.28 : 25,439.58 = 11,720.46 : x
  2. Step 2: Convert to fraction form
    18,437.28/25,439.58 = 11,720.46/x
  3. Step 3: Cross multiply
    18,437.28x = 25,439.58 × 11,720.46
  4. Step 4: Simplify right side
    18,437.28x = 298,163,579.81
  5. Step 5: Solve for x
    x = 298,163,579.81/18,437.28
  6. Step 6: Final answer
    x = 16,171.78

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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.