Home / 8,421.42-12,631.14-2,578.08

Finding the Fourth Proportional to 8,421.42, 12,631.14 and 2,578.08

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Solution

The fourth proportional to 8,421.42, 12,631.14 and 2,578.08 is: 3,866.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.42 : 12,631.14 = 2,578.08 : x
  2. Step 2: Convert to fraction form
    8,421.42/12,631.14 = 2,578.08/x
  3. Step 3: Cross multiply
    8,421.42x = 12,631.14 × 2,578.08
  4. Step 4: Simplify right side
    8,421.42x = 32,564,089.41
  5. Step 5: Solve for x
    x = 32,564,089.41/8,421.42
  6. Step 6: Final answer
    x = 3,866.82

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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.