Home / 21,198.04-31,800.40-6,405.12

Finding the Fourth Proportional to 21,198.04, 31,800.40 and 6,405.12

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Solution

The fourth proportional to 21,198.04, 31,800.40 and 6,405.12 is: 9,608.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.04 : 31,800.40 = 6,405.12 : x
  2. Step 2: Convert to fraction form
    21,198.04/31,800.40 = 6,405.12/x
  3. Step 3: Cross multiply
    21,198.04x = 31,800.40 × 6,405.12
  4. Step 4: Simplify right side
    21,198.04x = 203,685,378.05
  5. Step 5: Solve for x
    x = 203,685,378.05/21,198.04
  6. Step 6: Final answer
    x = 9,608.69

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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.