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Finding the Fourth Proportional to 21,668.08, 29,901.72 and 12,236.08

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Solution

The fourth proportional to 21,668.08, 29,901.72 and 12,236.08 is: 16,885.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.08 : 29,901.72 = 12,236.08 : x
  2. Step 2: Convert to fraction form
    21,668.08/29,901.72 = 12,236.08/x
  3. Step 3: Cross multiply
    21,668.08x = 29,901.72 × 12,236.08
  4. Step 4: Simplify right side
    21,668.08x = 365,879,838.06
  5. Step 5: Solve for x
    x = 365,879,838.06/21,668.08
  6. Step 6: Final answer
    x = 16,885.66

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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.