Home / 21,653.45-29,881.18-12,221.94

Finding the Fourth Proportional to 21,653.45, 29,881.18 and 12,221.94

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Solution

The fourth proportional to 21,653.45, 29,881.18 and 12,221.94 is: 16,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.45 : 29,881.18 = 12,221.94 : x
  2. Step 2: Convert to fraction form
    21,653.45/29,881.18 = 12,221.94/x
  3. Step 3: Cross multiply
    21,653.45x = 29,881.18 × 12,221.94
  4. Step 4: Simplify right side
    21,653.45x = 365,205,989.09
  5. Step 5: Solve for x
    x = 365,205,989.09/21,653.45
  6. Step 6: Final answer
    x = 16,865.95

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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.