Home / 13,290.32-18,340.64-7,321.99

Finding the Fourth Proportional to 13,290.32, 18,340.64 and 7,321.99

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Solution

The fourth proportional to 13,290.32, 18,340.64 and 7,321.99 is: 10,104.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.32 : 18,340.64 = 7,321.99 : x
  2. Step 2: Convert to fraction form
    13,290.32/18,340.64 = 7,321.99/x
  3. Step 3: Cross multiply
    13,290.32x = 18,340.64 × 7,321.99
  4. Step 4: Simplify right side
    13,290.32x = 134,289,939.10
  5. Step 5: Solve for x
    x = 134,289,939.10/13,290.32
  6. Step 6: Final answer
    x = 10,104.34

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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.