Home / 13,140.23-18,133.26-7,171.73

Finding the Fourth Proportional to 13,140.23, 18,133.26 and 7,171.73

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Solution

The fourth proportional to 13,140.23, 18,133.26 and 7,171.73 is: 9,896.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.23 : 18,133.26 = 7,171.73 : x
  2. Step 2: Convert to fraction form
    13,140.23/18,133.26 = 7,171.73/x
  3. Step 3: Cross multiply
    13,140.23x = 18,133.26 × 7,171.73
  4. Step 4: Simplify right side
    13,140.23x = 130,046,844.74
  5. Step 5: Solve for x
    x = 130,046,844.74/13,140.23
  6. Step 6: Final answer
    x = 9,896.85

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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.