Home / 21,905.24-30,234.66-12,479.40

Finding the Fourth Proportional to 21,905.24, 30,234.66 and 12,479.40

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Solution

The fourth proportional to 21,905.24, 30,234.66 and 12,479.40 is: 17,224.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.24 : 30,234.66 = 12,479.40 : x
  2. Step 2: Convert to fraction form
    21,905.24/30,234.66 = 12,479.40/x
  3. Step 3: Cross multiply
    21,905.24x = 30,234.66 × 12,479.40
  4. Step 4: Simplify right side
    21,905.24x = 377,310,416.00
  5. Step 5: Solve for x
    x = 377,310,416.00/21,905.24
  6. Step 6: Final answer
    x = 17,224.66

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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.