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Finding the Fourth Proportional to 21,164.91, 29,207.91 and 11,605.67

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Solution

The fourth proportional to 21,164.91, 29,207.91 and 11,605.67 is: 16,016.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,164.91 : 29,207.91 = 11,605.67 : x
  2. Step 2: Convert to fraction form
    21,164.91/29,207.91 = 11,605.67/x
  3. Step 3: Cross multiply
    21,164.91x = 29,207.91 × 11,605.67
  4. Step 4: Simplify right side
    21,164.91x = 338,977,364.85
  5. Step 5: Solve for x
    x = 338,977,364.85/21,164.91
  6. Step 6: Final answer
    x = 16,016.01

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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.