Home / 13,628.86-20,417.22-11,421.81

Finding the Fourth Proportional to 13,628.86, 20,417.22 and 11,421.81

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Solution

The fourth proportional to 13,628.86, 20,417.22 and 11,421.81 is: 17,110.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.86 : 20,417.22 = 11,421.81 : x
  2. Step 2: Convert to fraction form
    13,628.86/20,417.22 = 11,421.81/x
  3. Step 3: Cross multiply
    13,628.86x = 20,417.22 × 11,421.81
  4. Step 4: Simplify right side
    13,628.86x = 233,201,607.57
  5. Step 5: Solve for x
    x = 233,201,607.57/13,628.86
  6. Step 6: Final answer
    x = 17,110.87

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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.