Home / 13,289.76-18,339.37-7,321.30

Finding the Fourth Proportional to 13,289.76, 18,339.37 and 7,321.30

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Solution

The fourth proportional to 13,289.76, 18,339.37 and 7,321.30 is: 10,103.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.76 : 18,339.37 = 7,321.30 : x
  2. Step 2: Convert to fraction form
    13,289.76/18,339.37 = 7,321.30/x
  3. Step 3: Cross multiply
    13,289.76x = 18,339.37 × 7,321.30
  4. Step 4: Simplify right side
    13,289.76x = 134,268,029.58
  5. Step 5: Solve for x
    x = 134,268,029.58/13,289.76
  6. Step 6: Final answer
    x = 10,103.12

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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.