Home / 20,130.88-30,192.18-6,978.82

Finding the Fourth Proportional to 20,130.88, 30,192.18 and 6,978.82

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Solution

The fourth proportional to 20,130.88, 30,192.18 and 6,978.82 is: 10,466.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.88 : 30,192.18 = 6,978.82 : x
  2. Step 2: Convert to fraction form
    20,130.88/30,192.18 = 6,978.82/x
  3. Step 3: Cross multiply
    20,130.88x = 30,192.18 × 6,978.82
  4. Step 4: Simplify right side
    20,130.88x = 210,705,789.63
  5. Step 5: Solve for x
    x = 210,705,789.63/20,130.88
  6. Step 6: Final answer
    x = 10,466.79

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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.