Home / 21,609.86-29,824.33-12,660.78

Finding the Fourth Proportional to 21,609.86, 29,824.33 and 12,660.78

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Solution

The fourth proportional to 21,609.86, 29,824.33 and 12,660.78 is: 17,473.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,609.86 : 29,824.33 = 12,660.78 : x
  2. Step 2: Convert to fraction form
    21,609.86/29,824.33 = 12,660.78/x
  3. Step 3: Cross multiply
    21,609.86x = 29,824.33 × 12,660.78
  4. Step 4: Simplify right side
    21,609.86x = 377,599,280.78
  5. Step 5: Solve for x
    x = 377,599,280.78/21,609.86
  6. Step 6: Final answer
    x = 17,473.47

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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.