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Finding the Fourth Proportional to 21,670.69, 29,910.99 and 12,244.72

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Solution

The fourth proportional to 21,670.69, 29,910.99 and 12,244.72 is: 16,900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,670.69 : 29,910.99 = 12,244.72 : x
  2. Step 2: Convert to fraction form
    21,670.69/29,910.99 = 12,244.72/x
  3. Step 3: Cross multiply
    21,670.69x = 29,910.99 × 12,244.72
  4. Step 4: Simplify right side
    21,670.69x = 366,251,697.47
  5. Step 5: Solve for x
    x = 366,251,697.47/21,670.69
  6. Step 6: Final answer
    x = 16,900.79

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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.