Home / 15,005.09-20,705.24-8,290.33

Finding the Fourth Proportional to 15,005.09, 20,705.24 and 8,290.33

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Solution

The fourth proportional to 15,005.09, 20,705.24 and 8,290.33 is: 11,439.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.09 : 20,705.24 = 8,290.33 : x
  2. Step 2: Convert to fraction form
    15,005.09/20,705.24 = 8,290.33/x
  3. Step 3: Cross multiply
    15,005.09x = 20,705.24 × 8,290.33
  4. Step 4: Simplify right side
    15,005.09x = 171,653,241.29
  5. Step 5: Solve for x
    x = 171,653,241.29/15,005.09
  6. Step 6: Final answer
    x = 11,439.67

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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.