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Finding the Fourth Proportional to 21,665.34, 29,898 and 11,729.34

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Solution

The fourth proportional to 21,665.34, 29,898 and 11,729.34 is: 16,186.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,665.34 : 29,898 = 11,729.34 : x
  2. Step 2: Convert to fraction form
    21,665.34/29,898 = 11,729.34/x
  3. Step 3: Cross multiply
    21,665.34x = 29,898 × 11,729.34
  4. Step 4: Simplify right side
    21,665.34x = 350,683,807.32
  5. Step 5: Solve for x
    x = 350,683,807.32/21,665.34
  6. Step 6: Final answer
    x = 16,186.40

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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.