Home / 13,139.46-18,132.48-7,171.20

Finding the Fourth Proportional to 13,139.46, 18,132.48 and 7,171.20

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Solution

The fourth proportional to 13,139.46, 18,132.48 and 7,171.20 is: 9,896.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.46 : 18,132.48 = 7,171.20 : x
  2. Step 2: Convert to fraction form
    13,139.46/18,132.48 = 7,171.20/x
  3. Step 3: Cross multiply
    13,139.46x = 18,132.48 × 7,171.20
  4. Step 4: Simplify right side
    13,139.46x = 130,031,640.58
  5. Step 5: Solve for x
    x = 130,031,640.58/13,139.46
  6. Step 6: Final answer
    x = 9,896.27

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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.