Home / 18,439.40-25,382.40-13,955.24

Finding the Fourth Proportional to 18,439.40, 25,382.40 and 13,955.24

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Solution

The fourth proportional to 18,439.40, 25,382.40 and 13,955.24 is: 19,209.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.40 : 25,382.40 = 13,955.24 : x
  2. Step 2: Convert to fraction form
    18,439.40/25,382.40 = 13,955.24/x
  3. Step 3: Cross multiply
    18,439.40x = 25,382.40 × 13,955.24
  4. Step 4: Simplify right side
    18,439.40x = 354,217,356.86
  5. Step 5: Solve for x
    x = 354,217,356.86/18,439.40
  6. Step 6: Final answer
    x = 19,209.81

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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.