Home / 18,789.30-25,929.18-10,405.80

Finding the Fourth Proportional to 18,789.30, 25,929.18 and 10,405.80

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Solution

The fourth proportional to 18,789.30, 25,929.18 and 10,405.80 is: 14,359.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.30 : 25,929.18 = 10,405.80 : x
  2. Step 2: Convert to fraction form
    18,789.30/25,929.18 = 10,405.80/x
  3. Step 3: Cross multiply
    18,789.30x = 25,929.18 × 10,405.80
  4. Step 4: Simplify right side
    18,789.30x = 269,813,861.24
  5. Step 5: Solve for x
    x = 269,813,861.24/18,789.30
  6. Step 6: Final answer
    x = 14,359.97

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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.