Home / 13,780.28-20,669.33-4,417.81

Finding the Fourth Proportional to 13,780.28, 20,669.33 and 4,417.81

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Solution

The fourth proportional to 13,780.28, 20,669.33 and 4,417.81 is: 6,626.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.28 : 20,669.33 = 4,417.81 : x
  2. Step 2: Convert to fraction form
    13,780.28/20,669.33 = 4,417.81/x
  3. Step 3: Cross multiply
    13,780.28x = 20,669.33 × 4,417.81
  4. Step 4: Simplify right side
    13,780.28x = 91,313,132.14
  5. Step 5: Solve for x
    x = 91,313,132.14/13,780.28
  6. Step 6: Final answer
    x = 6,626.36

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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.