Home / 21,008.68-28,989.30-12,056.56

Finding the Fourth Proportional to 21,008.68, 28,989.30 and 12,056.56

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Solution

The fourth proportional to 21,008.68, 28,989.30 and 12,056.56 is: 16,636.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.68 : 28,989.30 = 12,056.56 : x
  2. Step 2: Convert to fraction form
    21,008.68/28,989.30 = 12,056.56/x
  3. Step 3: Cross multiply
    21,008.68x = 28,989.30 × 12,056.56
  4. Step 4: Simplify right side
    21,008.68x = 349,511,234.81
  5. Step 5: Solve for x
    x = 349,511,234.81/21,008.68
  6. Step 6: Final answer
    x = 16,636.52

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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.