Home / 13,143.12-19,714.80-4,378

Finding the Fourth Proportional to 13,143.12, 19,714.80 and 4,378

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Solution

The fourth proportional to 13,143.12, 19,714.80 and 4,378 is: 6,567.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.12 : 19,714.80 = 4,378 : x
  2. Step 2: Convert to fraction form
    13,143.12/19,714.80 = 4,378/x
  3. Step 3: Cross multiply
    13,143.12x = 19,714.80 × 4,378
  4. Step 4: Simplify right side
    13,143.12x = 86,311,394.40
  5. Step 5: Solve for x
    x = 86,311,394.40/13,143.12
  6. Step 6: Final answer
    x = 6,567.04

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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.