Home / 12,406.20-17,120.21-7,100.84

Finding the Fourth Proportional to 12,406.20, 17,120.21 and 7,100.84

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Solution

The fourth proportional to 12,406.20, 17,120.21 and 7,100.84 is: 9,798.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,406.20 : 17,120.21 = 7,100.84 : x
  2. Step 2: Convert to fraction form
    12,406.20/17,120.21 = 7,100.84/x
  3. Step 3: Cross multiply
    12,406.20x = 17,120.21 × 7,100.84
  4. Step 4: Simplify right side
    12,406.20x = 121,567,750.87
  5. Step 5: Solve for x
    x = 121,567,750.87/12,406.20
  6. Step 6: Final answer
    x = 9,798.95

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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.