Home / 13,289.79-18,339.83-7,321.32

Finding the Fourth Proportional to 13,289.79, 18,339.83 and 7,321.32

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Solution

The fourth proportional to 13,289.79, 18,339.83 and 7,321.32 is: 10,103.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.79 : 18,339.83 = 7,321.32 : x
  2. Step 2: Convert to fraction form
    13,289.79/18,339.83 = 7,321.32/x
  3. Step 3: Cross multiply
    13,289.79x = 18,339.83 × 7,321.32
  4. Step 4: Simplify right side
    13,289.79x = 134,271,727.57
  5. Step 5: Solve for x
    x = 134,271,727.57/13,289.79
  6. Step 6: Final answer
    x = 10,103.37

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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.