Home / 13,878.18-20,815.38-5,562.99

Finding the Fourth Proportional to 13,878.18, 20,815.38 and 5,562.99

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Solution

The fourth proportional to 13,878.18, 20,815.38 and 5,562.99 is: 8,343.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.18 : 20,815.38 = 5,562.99 : x
  2. Step 2: Convert to fraction form
    13,878.18/20,815.38 = 5,562.99/x
  3. Step 3: Cross multiply
    13,878.18x = 20,815.38 × 5,562.99
  4. Step 4: Simplify right side
    13,878.18x = 115,795,750.79
  5. Step 5: Solve for x
    x = 115,795,750.79/13,878.18
  6. Step 6: Final answer
    x = 8,343.73

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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.