Home / 21,872.61-32,824.83-8,728.74

Finding the Fourth Proportional to 21,872.61, 32,824.83 and 8,728.74

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Solution

The fourth proportional to 21,872.61, 32,824.83 and 8,728.74 is: 13,099.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,872.61 : 32,824.83 = 8,728.74 : x
  2. Step 2: Convert to fraction form
    21,872.61/32,824.83 = 8,728.74/x
  3. Step 3: Cross multiply
    21,872.61x = 32,824.83 × 8,728.74
  4. Step 4: Simplify right side
    21,872.61x = 286,519,406.61
  5. Step 5: Solve for x
    x = 286,519,406.61/21,872.61
  6. Step 6: Final answer
    x = 13,099.46

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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.