Home / 13,205.76-19,815.93-5,412.75

Finding the Fourth Proportional to 13,205.76, 19,815.93 and 5,412.75

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Solution

The fourth proportional to 13,205.76, 19,815.93 and 5,412.75 is: 8,122.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.76 : 19,815.93 = 5,412.75 : x
  2. Step 2: Convert to fraction form
    13,205.76/19,815.93 = 5,412.75/x
  3. Step 3: Cross multiply
    13,205.76x = 19,815.93 × 5,412.75
  4. Step 4: Simplify right side
    13,205.76x = 107,258,675.11
  5. Step 5: Solve for x
    x = 107,258,675.11/13,205.76
  6. Step 6: Final answer
    x = 8,122.11

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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.