Home / 8,145.60-12,222.45-3,215.40

Finding the Fourth Proportional to 8,145.60, 12,222.45 and 3,215.40

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Solution

The fourth proportional to 8,145.60, 12,222.45 and 3,215.40 is: 4,824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.60 : 12,222.45 = 3,215.40 : x
  2. Step 2: Convert to fraction form
    8,145.60/12,222.45 = 3,215.40/x
  3. Step 3: Cross multiply
    8,145.60x = 12,222.45 × 3,215.40
  4. Step 4: Simplify right side
    8,145.60x = 39,300,065.73
  5. Step 5: Solve for x
    x = 39,300,065.73/8,145.60
  6. Step 6: Final answer
    x = 4,824.70

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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.