Home / 13,399.71-18,491.25-7,431.36

Finding the Fourth Proportional to 13,399.71, 18,491.25 and 7,431.36

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Solution

The fourth proportional to 13,399.71, 18,491.25 and 7,431.36 is: 10,255.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.71 : 18,491.25 = 7,431.36 : x
  2. Step 2: Convert to fraction form
    13,399.71/18,491.25 = 7,431.36/x
  3. Step 3: Cross multiply
    13,399.71x = 18,491.25 × 7,431.36
  4. Step 4: Simplify right side
    13,399.71x = 137,415,135.60
  5. Step 5: Solve for x
    x = 137,415,135.60/13,399.71
  6. Step 6: Final answer
    x = 10,255.08

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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.