Home / 12,918-19,377.36-4,153.68

Finding the Fourth Proportional to 12,918, 19,377.36 and 4,153.68

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Solution

The fourth proportional to 12,918, 19,377.36 and 4,153.68 is: 6,230.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918 : 19,377.36 = 4,153.68 : x
  2. Step 2: Convert to fraction form
    12,918/19,377.36 = 4,153.68/x
  3. Step 3: Cross multiply
    12,918x = 19,377.36 × 4,153.68
  4. Step 4: Simplify right side
    12,918x = 80,487,352.68
  5. Step 5: Solve for x
    x = 80,487,352.68/12,918
  6. Step 6: Final answer
    x = 6,230.64

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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.