Home / 13,798.08-20,591.09-12,321.78

Finding the Fourth Proportional to 13,798.08, 20,591.09 and 12,321.78

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Solution

The fourth proportional to 13,798.08, 20,591.09 and 12,321.78 is: 18,387.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,798.08 : 20,591.09 = 12,321.78 : x
  2. Step 2: Convert to fraction form
    13,798.08/20,591.09 = 12,321.78/x
  3. Step 3: Cross multiply
    13,798.08x = 20,591.09 × 12,321.78
  4. Step 4: Simplify right side
    13,798.08x = 253,718,819.33
  5. Step 5: Solve for x
    x = 253,718,819.33/13,798.08
  6. Step 6: Final answer
    x = 18,387.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.