Home / 13,290.09-18,339.64-7,321.62

Finding the Fourth Proportional to 13,290.09, 18,339.64 and 7,321.62

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Solution

The fourth proportional to 13,290.09, 18,339.64 and 7,321.62 is: 10,103.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.09 : 18,339.64 = 7,321.62 : x
  2. Step 2: Convert to fraction form
    13,290.09/18,339.64 = 7,321.62/x
  3. Step 3: Cross multiply
    13,290.09x = 18,339.64 × 7,321.62
  4. Step 4: Simplify right side
    13,290.09x = 134,275,925.49
  5. Step 5: Solve for x
    x = 134,275,925.49/13,290.09
  6. Step 6: Final answer
    x = 10,103.47

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Similar ratio
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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.