Home / 13,289.12-18,338.88-7,321.44

Finding the Fourth Proportional to 13,289.12, 18,338.88 and 7,321.44

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Solution

The fourth proportional to 13,289.12, 18,338.88 and 7,321.44 is: 10,103.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.12 : 18,338.88 = 7,321.44 : x
  2. Step 2: Convert to fraction form
    13,289.12/18,338.88 = 7,321.44/x
  3. Step 3: Cross multiply
    13,289.12x = 18,338.88 × 7,321.44
  4. Step 4: Simplify right side
    13,289.12x = 134,267,009.59
  5. Step 5: Solve for x
    x = 134,267,009.59/13,289.12
  6. Step 6: Final answer
    x = 10,103.53

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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.