Home / 13,145.22-18,140.83-7,177.34

Finding the Fourth Proportional to 13,145.22, 18,140.83 and 7,177.34

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Solution

The fourth proportional to 13,145.22, 18,140.83 and 7,177.34 is: 9,904.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.22 : 18,140.83 = 7,177.34 : x
  2. Step 2: Convert to fraction form
    13,145.22/18,140.83 = 7,177.34/x
  3. Step 3: Cross multiply
    13,145.22x = 18,140.83 × 7,177.34
  4. Step 4: Simplify right side
    13,145.22x = 130,202,959.12
  5. Step 5: Solve for x
    x = 130,202,959.12/13,145.22
  6. Step 6: Final answer
    x = 9,904.97

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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.