Home / 11,918.24-17,871.80-4,421.50

Finding the Fourth Proportional to 11,918.24, 17,871.80 and 4,421.50

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Solution

The fourth proportional to 11,918.24, 17,871.80 and 4,421.50 is: 6,630.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.24 : 17,871.80 = 4,421.50 : x
  2. Step 2: Convert to fraction form
    11,918.24/17,871.80 = 4,421.50/x
  3. Step 3: Cross multiply
    11,918.24x = 17,871.80 × 4,421.50
  4. Step 4: Simplify right side
    11,918.24x = 79,020,163.70
  5. Step 5: Solve for x
    x = 79,020,163.70/11,918.24
  6. Step 6: Final answer
    x = 6,630.19

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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.