Home / 21,909.48-30,234.98-11,972.84

Finding the Fourth Proportional to 21,909.48, 30,234.98 and 11,972.84

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Solution

The fourth proportional to 21,909.48, 30,234.98 and 11,972.84 is: 16,522.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.48 : 30,234.98 = 11,972.84 : x
  2. Step 2: Convert to fraction form
    21,909.48/30,234.98 = 11,972.84/x
  3. Step 3: Cross multiply
    21,909.48x = 30,234.98 × 11,972.84
  4. Step 4: Simplify right side
    21,909.48x = 361,998,577.94
  5. Step 5: Solve for x
    x = 361,998,577.94/21,909.48
  6. Step 6: Final answer
    x = 16,522.46

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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.