Home / 13,178.72-19,770.12-4,291.28

Finding the Fourth Proportional to 13,178.72, 19,770.12 and 4,291.28

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Solution

The fourth proportional to 13,178.72, 19,770.12 and 4,291.28 is: 6,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.72 : 19,770.12 = 4,291.28 : x
  2. Step 2: Convert to fraction form
    13,178.72/19,770.12 = 4,291.28/x
  3. Step 3: Cross multiply
    13,178.72x = 19,770.12 × 4,291.28
  4. Step 4: Simplify right side
    13,178.72x = 84,839,120.55
  5. Step 5: Solve for x
    x = 84,839,120.55/13,178.72
  6. Step 6: Final answer
    x = 6,437.58

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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.