Home / 20,390.45-30,588.72-7,241.72

Finding the Fourth Proportional to 20,390.45, 30,588.72 and 7,241.72

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Solution

The fourth proportional to 20,390.45, 30,588.72 and 7,241.72 is: 10,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.45 : 30,588.72 = 7,241.72 : x
  2. Step 2: Convert to fraction form
    20,390.45/30,588.72 = 7,241.72/x
  3. Step 3: Cross multiply
    20,390.45x = 30,588.72 × 7,241.72
  4. Step 4: Simplify right side
    20,390.45x = 221,514,945.40
  5. Step 5: Solve for x
    x = 221,514,945.40/20,390.45
  6. Step 6: Final answer
    x = 10,863.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.