Home / 20,780.45-31,170.47-5,198.07

Finding the Fourth Proportional to 20,780.45, 31,170.47 and 5,198.07

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Solution

The fourth proportional to 20,780.45, 31,170.47 and 5,198.07 is: 7,797.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.45 : 31,170.47 = 5,198.07 : x
  2. Step 2: Convert to fraction form
    20,780.45/31,170.47 = 5,198.07/x
  3. Step 3: Cross multiply
    20,780.45x = 31,170.47 × 5,198.07
  4. Step 4: Simplify right side
    20,780.45x = 162,026,259.00
  5. Step 5: Solve for x
    x = 162,026,259.00/20,780.45
  6. Step 6: Final answer
    x = 7,797.05

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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.