Home / 9,368.20-12,908.40-6,378.76

Finding the Fourth Proportional to 9,368.20, 12,908.40 and 6,378.76

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Solution

The fourth proportional to 9,368.20, 12,908.40 and 6,378.76 is: 8,789.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.20 : 12,908.40 = 6,378.76 : x
  2. Step 2: Convert to fraction form
    9,368.20/12,908.40 = 6,378.76/x
  3. Step 3: Cross multiply
    9,368.20x = 12,908.40 × 6,378.76
  4. Step 4: Simplify right side
    9,368.20x = 82,339,585.58
  5. Step 5: Solve for x
    x = 82,339,585.58/9,368.20
  6. Step 6: Final answer
    x = 8,789.26

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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.