Home / 8,145.61-12,221.88-5,516.08

Finding the Fourth Proportional to 8,145.61, 12,221.88 and 5,516.08

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Solution

The fourth proportional to 8,145.61, 12,221.88 and 5,516.08 is: 8,276.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.61 : 12,221.88 = 5,516.08 : x
  2. Step 2: Convert to fraction form
    8,145.61/12,221.88 = 5,516.08/x
  3. Step 3: Cross multiply
    8,145.61x = 12,221.88 × 5,516.08
  4. Step 4: Simplify right side
    8,145.61x = 67,416,867.83
  5. Step 5: Solve for x
    x = 67,416,867.83/8,145.61
  6. Step 6: Final answer
    x = 8,276.47

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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.