Home / 21,118.12-31,656.22-11,762.42

Finding the Fourth Proportional to 21,118.12, 31,656.22 and 11,762.42

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Solution

The fourth proportional to 21,118.12, 31,656.22 and 11,762.42 is: 17,631.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.12 : 31,656.22 = 11,762.42 : x
  2. Step 2: Convert to fraction form
    21,118.12/31,656.22 = 11,762.42/x
  3. Step 3: Cross multiply
    21,118.12x = 31,656.22 × 11,762.42
  4. Step 4: Simplify right side
    21,118.12x = 372,353,567.57
  5. Step 5: Solve for x
    x = 372,353,567.57/21,118.12
  6. Step 6: Final answer
    x = 17,631.95

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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.