Home / 8,815.32-12,175.80-6,421.44

Finding the Fourth Proportional to 8,815.32, 12,175.80 and 6,421.44

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Solution

The fourth proportional to 8,815.32, 12,175.80 and 6,421.44 is: 8,869.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.32 : 12,175.80 = 6,421.44 : x
  2. Step 2: Convert to fraction form
    8,815.32/12,175.80 = 6,421.44/x
  3. Step 3: Cross multiply
    8,815.32x = 12,175.80 × 6,421.44
  4. Step 4: Simplify right side
    8,815.32x = 78,186,169.15
  5. Step 5: Solve for x
    x = 78,186,169.15/8,815.32
  6. Step 6: Final answer
    x = 8,869.35

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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.