Home / 13,681.41-18,880.37-7,393.79

Finding the Fourth Proportional to 13,681.41, 18,880.37 and 7,393.79

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Solution

The fourth proportional to 13,681.41, 18,880.37 and 7,393.79 is: 10,203.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.41 : 18,880.37 = 7,393.79 : x
  2. Step 2: Convert to fraction form
    13,681.41/18,880.37 = 7,393.79/x
  3. Step 3: Cross multiply
    13,681.41x = 18,880.37 × 7,393.79
  4. Step 4: Simplify right side
    13,681.41x = 139,597,430.33
  5. Step 5: Solve for x
    x = 139,597,430.33/13,681.41
  6. Step 6: Final answer
    x = 10,203.44

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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.