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Finding the Fourth Proportional to 21,654.44, 29,911.81 and 17,421.44

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Solution

The fourth proportional to 21,654.44, 29,911.81 and 17,421.44 is: 24,064.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,654.44 : 29,911.81 = 17,421.44 : x
  2. Step 2: Convert to fraction form
    21,654.44/29,911.81 = 17,421.44/x
  3. Step 3: Cross multiply
    21,654.44x = 29,911.81 × 17,421.44
  4. Step 4: Simplify right side
    21,654.44x = 521,106,834.43
  5. Step 5: Solve for x
    x = 521,106,834.43/21,654.44
  6. Step 6: Final answer
    x = 24,064.67

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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.