Home / 8,815.88-12,182-6,421.68

Finding the Fourth Proportional to 8,815.88, 12,182 and 6,421.68

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Solution

The fourth proportional to 8,815.88, 12,182 and 6,421.68 is: 8,873.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.88 : 12,182 = 6,421.68 : x
  2. Step 2: Convert to fraction form
    8,815.88/12,182 = 6,421.68/x
  3. Step 3: Cross multiply
    8,815.88x = 12,182 × 6,421.68
  4. Step 4: Simplify right side
    8,815.88x = 78,228,905.76
  5. Step 5: Solve for x
    x = 78,228,905.76/8,815.88
  6. Step 6: Final answer
    x = 8,873.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.