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Finding the Fourth Proportional to 8,465.46, 12,700.78 and 3,789.40

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Solution

The fourth proportional to 8,465.46, 12,700.78 and 3,789.40 is: 5,685.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,465.46 : 12,700.78 = 3,789.40 : x
  2. Step 2: Convert to fraction form
    8,465.46/12,700.78 = 3,789.40/x
  3. Step 3: Cross multiply
    8,465.46x = 12,700.78 × 3,789.40
  4. Step 4: Simplify right side
    8,465.46x = 48,128,335.73
  5. Step 5: Solve for x
    x = 48,128,335.73/8,465.46
  6. Step 6: Final answer
    x = 5,685.26

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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.