Home / 18,390.36-25,378.40-11,316.60

Finding the Fourth Proportional to 18,390.36, 25,378.40 and 11,316.60

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Solution

The fourth proportional to 18,390.36, 25,378.40 and 11,316.60 is: 15,616.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.36 : 25,378.40 = 11,316.60 : x
  2. Step 2: Convert to fraction form
    18,390.36/25,378.40 = 11,316.60/x
  3. Step 3: Cross multiply
    18,390.36x = 25,378.40 × 11,316.60
  4. Step 4: Simplify right side
    18,390.36x = 287,197,201.44
  5. Step 5: Solve for x
    x = 287,197,201.44/18,390.36
  6. Step 6: Final answer
    x = 15,616.73

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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.