Home / 13,192.20-19,780.20-7,642.80

Finding the Fourth Proportional to 13,192.20, 19,780.20 and 7,642.80

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Solution

The fourth proportional to 13,192.20, 19,780.20 and 7,642.80 is: 11,459.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,192.20 : 19,780.20 = 7,642.80 : x
  2. Step 2: Convert to fraction form
    13,192.20/19,780.20 = 7,642.80/x
  3. Step 3: Cross multiply
    13,192.20x = 19,780.20 × 7,642.80
  4. Step 4: Simplify right side
    13,192.20x = 151,176,112.56
  5. Step 5: Solve for x
    x = 151,176,112.56/13,192.20
  6. Step 6: Final answer
    x = 11,459.51

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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.