Home / 8,128.08-12,179.40-6,283.74

Finding the Fourth Proportional to 8,128.08, 12,179.40 and 6,283.74

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Solution

The fourth proportional to 8,128.08, 12,179.40 and 6,283.74 is: 9,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.08 : 12,179.40 = 6,283.74 : x
  2. Step 2: Convert to fraction form
    8,128.08/12,179.40 = 6,283.74/x
  3. Step 3: Cross multiply
    8,128.08x = 12,179.40 × 6,283.74
  4. Step 4: Simplify right side
    8,128.08x = 76,532,182.96
  5. Step 5: Solve for x
    x = 76,532,182.96/8,128.08
  6. Step 6: Final answer
    x = 9,415.78

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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.