Home / 18,389.36-25,369.80-12,803.60

Finding the Fourth Proportional to 18,389.36, 25,369.80 and 12,803.60

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Solution

The fourth proportional to 18,389.36, 25,369.80 and 12,803.60 is: 17,663.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,389.36 : 25,369.80 = 12,803.60 : x
  2. Step 2: Convert to fraction form
    18,389.36/25,369.80 = 12,803.60/x
  3. Step 3: Cross multiply
    18,389.36x = 25,369.80 × 12,803.60
  4. Step 4: Simplify right side
    18,389.36x = 324,824,771.28
  5. Step 5: Solve for x
    x = 324,824,771.28/18,389.36
  6. Step 6: Final answer
    x = 17,663.73

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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.