Home / 21,215.25-29,282.31-12,267.95

Finding the Fourth Proportional to 21,215.25, 29,282.31 and 12,267.95

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Solution

The fourth proportional to 21,215.25, 29,282.31 and 12,267.95 is: 16,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.25 : 29,282.31 = 12,267.95 : x
  2. Step 2: Convert to fraction form
    21,215.25/29,282.31 = 12,267.95/x
  3. Step 3: Cross multiply
    21,215.25x = 29,282.31 × 12,267.95
  4. Step 4: Simplify right side
    21,215.25x = 359,233,768.55
  5. Step 5: Solve for x
    x = 359,233,768.55/21,215.25
  6. Step 6: Final answer
    x = 16,932.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.