Home / 13,421.51-20,128.22-5,628.59

Finding the Fourth Proportional to 13,421.51, 20,128.22 and 5,628.59

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Solution

The fourth proportional to 13,421.51, 20,128.22 and 5,628.59 is: 8,441.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.51 : 20,128.22 = 5,628.59 : x
  2. Step 2: Convert to fraction form
    13,421.51/20,128.22 = 5,628.59/x
  3. Step 3: Cross multiply
    13,421.51x = 20,128.22 × 5,628.59
  4. Step 4: Simplify right side
    13,421.51x = 113,293,469.67
  5. Step 5: Solve for x
    x = 113,293,469.67/13,421.51
  6. Step 6: Final answer
    x = 8,441.19

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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.