Home / 13,155.66-19,731.30-3,919.50

Finding the Fourth Proportional to 13,155.66, 19,731.30 and 3,919.50

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Solution

The fourth proportional to 13,155.66, 19,731.30 and 3,919.50 is: 5,878.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.66 : 19,731.30 = 3,919.50 : x
  2. Step 2: Convert to fraction form
    13,155.66/19,731.30 = 3,919.50/x
  3. Step 3: Cross multiply
    13,155.66x = 19,731.30 × 3,919.50
  4. Step 4: Simplify right side
    13,155.66x = 77,336,830.35
  5. Step 5: Solve for x
    x = 77,336,830.35/13,155.66
  6. Step 6: Final answer
    x = 5,878.60

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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.