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Finding the Fourth Proportional to 8,582.66, 12,871.27 and 4,421.38

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Solution

The fourth proportional to 8,582.66, 12,871.27 and 4,421.38 is: 6,630.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,582.66 : 12,871.27 = 4,421.38 : x
  2. Step 2: Convert to fraction form
    8,582.66/12,871.27 = 4,421.38/x
  3. Step 3: Cross multiply
    8,582.66x = 12,871.27 × 4,421.38
  4. Step 4: Simplify right side
    8,582.66x = 56,908,775.75
  5. Step 5: Solve for x
    x = 56,908,775.75/8,582.66
  6. Step 6: Final answer
    x = 6,630.67

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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.