Home / 13,131.71-18,122.01-7,163.60

Finding the Fourth Proportional to 13,131.71, 18,122.01 and 7,163.60

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Solution

The fourth proportional to 13,131.71, 18,122.01 and 7,163.60 is: 9,885.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.71 : 18,122.01 = 7,163.60 : x
  2. Step 2: Convert to fraction form
    13,131.71/18,122.01 = 7,163.60/x
  3. Step 3: Cross multiply
    13,131.71x = 18,122.01 × 7,163.60
  4. Step 4: Simplify right side
    13,131.71x = 129,818,740.23
  5. Step 5: Solve for x
    x = 129,818,740.23/13,131.71
  6. Step 6: Final answer
    x = 9,885.90

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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.