Home / 12,381.84-18,562.32-8,421.99

Finding the Fourth Proportional to 12,381.84, 18,562.32 and 8,421.99

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Solution

The fourth proportional to 12,381.84, 18,562.32 and 8,421.99 is: 12,625.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.84 : 18,562.32 = 8,421.99 : x
  2. Step 2: Convert to fraction form
    12,381.84/18,562.32 = 8,421.99/x
  3. Step 3: Cross multiply
    12,381.84x = 18,562.32 × 8,421.99
  4. Step 4: Simplify right side
    12,381.84x = 156,331,673.42
  5. Step 5: Solve for x
    x = 156,331,673.42/12,381.84
  6. Step 6: Final answer
    x = 12,625.88

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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.