Home / 20,697.40-28,562.08-12,198.18

Finding the Fourth Proportional to 20,697.40, 28,562.08 and 12,198.18

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Solution

The fourth proportional to 20,697.40, 28,562.08 and 12,198.18 is: 16,833.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.40 : 28,562.08 = 12,198.18 : x
  2. Step 2: Convert to fraction form
    20,697.40/28,562.08 = 12,198.18/x
  3. Step 3: Cross multiply
    20,697.40x = 28,562.08 × 12,198.18
  4. Step 4: Simplify right side
    20,697.40x = 348,405,393.01
  5. Step 5: Solve for x
    x = 348,405,393.01/20,697.40
  6. Step 6: Final answer
    x = 16,833.29

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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.