Home / 8,426.40-12,629.76-6,339.70

Finding the Fourth Proportional to 8,426.40, 12,629.76 and 6,339.70

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Solution

The fourth proportional to 8,426.40, 12,629.76 and 6,339.70 is: 9,502.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.40 : 12,629.76 = 6,339.70 : x
  2. Step 2: Convert to fraction form
    8,426.40/12,629.76 = 6,339.70/x
  3. Step 3: Cross multiply
    8,426.40x = 12,629.76 × 6,339.70
  4. Step 4: Simplify right side
    8,426.40x = 80,068,881.49
  5. Step 5: Solve for x
    x = 80,068,881.49/8,426.40
  6. Step 6: Final answer
    x = 9,502.15

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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.