Home / 13,289.39-18,339.68-7,321.11

Finding the Fourth Proportional to 13,289.39, 18,339.68 and 7,321.11

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Solution

The fourth proportional to 13,289.39, 18,339.68 and 7,321.11 is: 10,103.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.39 : 18,339.68 = 7,321.11 : x
  2. Step 2: Convert to fraction form
    13,289.39/18,339.68 = 7,321.11/x
  3. Step 3: Cross multiply
    13,289.39x = 18,339.68 × 7,321.11
  4. Step 4: Simplify right side
    13,289.39x = 134,266,814.64
  5. Step 5: Solve for x
    x = 134,266,814.64/13,289.39
  6. Step 6: Final answer
    x = 10,103.31

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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.