Home / 13,415.99-20,128.10-6,404.94

Finding the Fourth Proportional to 13,415.99, 20,128.10 and 6,404.94

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Solution

The fourth proportional to 13,415.99, 20,128.10 and 6,404.94 is: 9,609.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.99 : 20,128.10 = 6,404.94 : x
  2. Step 2: Convert to fraction form
    13,415.99/20,128.10 = 6,404.94/x
  3. Step 3: Cross multiply
    13,415.99x = 20,128.10 × 6,404.94
  4. Step 4: Simplify right side
    13,415.99x = 128,919,240.79
  5. Step 5: Solve for x
    x = 128,919,240.79/13,415.99
  6. Step 6: Final answer
    x = 9,609.38

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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.