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Finding the Fourth Proportional to 17,421.80, 26,132.70 and 11,892.20

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Solution

The fourth proportional to 17,421.80, 26,132.70 and 11,892.20 is: 17,838.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,421.80 : 26,132.70 = 11,892.20 : x
  2. Step 2: Convert to fraction form
    17,421.80/26,132.70 = 11,892.20/x
  3. Step 3: Cross multiply
    17,421.80x = 26,132.70 × 11,892.20
  4. Step 4: Simplify right side
    17,421.80x = 310,775,294.94
  5. Step 5: Solve for x
    x = 310,775,294.94/17,421.80
  6. Step 6: Final answer
    x = 17,838.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.