Home / 13,289.80-18,340.16-7,321.43

Finding the Fourth Proportional to 13,289.80, 18,340.16 and 7,321.43

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Solution

The fourth proportional to 13,289.80, 18,340.16 and 7,321.43 is: 10,103.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.80 : 18,340.16 = 7,321.43 : x
  2. Step 2: Convert to fraction form
    13,289.80/18,340.16 = 7,321.43/x
  3. Step 3: Cross multiply
    13,289.80x = 18,340.16 × 7,321.43
  4. Step 4: Simplify right side
    13,289.80x = 134,276,069.32
  5. Step 5: Solve for x
    x = 134,276,069.32/13,289.80
  6. Step 6: Final answer
    x = 10,103.70

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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.