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Finding the Fourth Proportional to 21,628.94, 29,849.11 and 12,070.94

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Solution

The fourth proportional to 21,628.94, 29,849.11 and 12,070.94 is: 16,658.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,628.94 : 29,849.11 = 12,070.94 : x
  2. Step 2: Convert to fraction form
    21,628.94/29,849.11 = 12,070.94/x
  3. Step 3: Cross multiply
    21,628.94x = 29,849.11 × 12,070.94
  4. Step 4: Simplify right side
    21,628.94x = 360,306,636.44
  5. Step 5: Solve for x
    x = 360,306,636.44/21,628.94
  6. Step 6: Final answer
    x = 16,658.55

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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.