Home / 13,939.20-19,245.60-9,748.80

Finding the Fourth Proportional to 13,939.20, 19,245.60 and 9,748.80

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Solution

The fourth proportional to 13,939.20, 19,245.60 and 9,748.80 is: 13,459.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.20 : 19,245.60 = 9,748.80 : x
  2. Step 2: Convert to fraction form
    13,939.20/19,245.60 = 9,748.80/x
  3. Step 3: Cross multiply
    13,939.20x = 19,245.60 × 9,748.80
  4. Step 4: Simplify right side
    13,939.20x = 187,621,505.28
  5. Step 5: Solve for x
    x = 187,621,505.28/13,939.20
  6. Step 6: Final answer
    x = 13,459.99

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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.