Home / 18,430.20-27,645.30-12,889.80

Finding the Fourth Proportional to 18,430.20, 27,645.30 and 12,889.80

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Solution

The fourth proportional to 18,430.20, 27,645.30 and 12,889.80 is: 19,334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,430.20 : 27,645.30 = 12,889.80 : x
  2. Step 2: Convert to fraction form
    18,430.20/27,645.30 = 12,889.80/x
  3. Step 3: Cross multiply
    18,430.20x = 27,645.30 × 12,889.80
  4. Step 4: Simplify right side
    18,430.20x = 356,342,387.94
  5. Step 5: Solve for x
    x = 356,342,387.94/18,430.20
  6. Step 6: Final answer
    x = 19,334.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.