Home / 9,198.18-12,689.73-6,405.30

Finding the Fourth Proportional to 9,198.18, 12,689.73 and 6,405.30

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Solution

The fourth proportional to 9,198.18, 12,689.73 and 6,405.30 is: 8,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,198.18 : 12,689.73 = 6,405.30 : x
  2. Step 2: Convert to fraction form
    9,198.18/12,689.73 = 6,405.30/x
  3. Step 3: Cross multiply
    9,198.18x = 12,689.73 × 6,405.30
  4. Step 4: Simplify right side
    9,198.18x = 81,281,527.57
  5. Step 5: Solve for x
    x = 81,281,527.57/9,198.18
  6. Step 6: Final answer
    x = 8,836.70

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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.