Home / 13,918.76-20,868.68-5,148.89

Finding the Fourth Proportional to 13,918.76, 20,868.68 and 5,148.89

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Solution

The fourth proportional to 13,918.76, 20,868.68 and 5,148.89 is: 7,719.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.76 : 20,868.68 = 5,148.89 : x
  2. Step 2: Convert to fraction form
    13,918.76/20,868.68 = 5,148.89/x
  3. Step 3: Cross multiply
    13,918.76x = 20,868.68 × 5,148.89
  4. Step 4: Simplify right side
    13,918.76x = 107,450,446.29
  5. Step 5: Solve for x
    x = 107,450,446.29/13,918.76
  6. Step 6: Final answer
    x = 7,719.83

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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.