Home / 21,909.92-30,233.94-12,957.80

Finding the Fourth Proportional to 21,909.92, 30,233.94 and 12,957.80

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Solution

The fourth proportional to 21,909.92, 30,233.94 and 12,957.80 is: 17,880.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.92 : 30,233.94 = 12,957.80 : x
  2. Step 2: Convert to fraction form
    21,909.92/30,233.94 = 12,957.80/x
  3. Step 3: Cross multiply
    21,909.92x = 30,233.94 × 12,957.80
  4. Step 4: Simplify right side
    21,909.92x = 391,765,347.73
  5. Step 5: Solve for x
    x = 391,765,347.73/21,909.92
  6. Step 6: Final answer
    x = 17,880.73

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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.