Home / 18,391.32-25,378.29-12,431.03

Finding the Fourth Proportional to 18,391.32, 25,378.29 and 12,431.03

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Solution

The fourth proportional to 18,391.32, 25,378.29 and 12,431.03 is: 17,153.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.32 : 25,378.29 = 12,431.03 : x
  2. Step 2: Convert to fraction form
    18,391.32/25,378.29 = 12,431.03/x
  3. Step 3: Cross multiply
    18,391.32x = 25,378.29 × 12,431.03
  4. Step 4: Simplify right side
    18,391.32x = 315,478,157.45
  5. Step 5: Solve for x
    x = 315,478,157.45/18,391.32
  6. Step 6: Final answer
    x = 17,153.64

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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.