Home / 21,215.90-31,777.06-13,292.62

Finding the Fourth Proportional to 21,215.90, 31,777.06 and 13,292.62

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Solution

The fourth proportional to 21,215.90, 31,777.06 and 13,292.62 is: 19,909.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.90 : 31,777.06 = 13,292.62 : x
  2. Step 2: Convert to fraction form
    21,215.90/31,777.06 = 13,292.62/x
  3. Step 3: Cross multiply
    21,215.90x = 31,777.06 × 13,292.62
  4. Step 4: Simplify right side
    21,215.90x = 422,400,383.30
  5. Step 5: Solve for x
    x = 422,400,383.30/21,215.90
  6. Step 6: Final answer
    x = 19,909.61

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1.5x scale

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.