Home / 13,289.42-18,339.39-7,321.07

Finding the Fourth Proportional to 13,289.42, 18,339.39 and 7,321.07

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Solution

The fourth proportional to 13,289.42, 18,339.39 and 7,321.07 is: 10,103.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.42 : 18,339.39 = 7,321.07 : x
  2. Step 2: Convert to fraction form
    13,289.42/18,339.39 = 7,321.07/x
  3. Step 3: Cross multiply
    13,289.42x = 18,339.39 × 7,321.07
  4. Step 4: Simplify right side
    13,289.42x = 134,263,866.25
  5. Step 5: Solve for x
    x = 134,263,866.25/13,289.42
  6. Step 6: Final answer
    x = 10,103.07

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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.