Home / 13,139.06-18,132.29-7,171.12

Finding the Fourth Proportional to 13,139.06, 18,132.29 and 7,171.12

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Solution

The fourth proportional to 13,139.06, 18,132.29 and 7,171.12 is: 9,896.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.06 : 18,132.29 = 7,171.12 : x
  2. Step 2: Convert to fraction form
    13,139.06/18,132.29 = 7,171.12/x
  3. Step 3: Cross multiply
    13,139.06x = 18,132.29 × 7,171.12
  4. Step 4: Simplify right side
    13,139.06x = 130,028,739.17
  5. Step 5: Solve for x
    x = 130,028,739.17/13,139.06
  6. Step 6: Final answer
    x = 9,896.35

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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.