Home / 21,775.28-32,621.81-12,864.02

Finding the Fourth Proportional to 21,775.28, 32,621.81 and 12,864.02

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Solution

The fourth proportional to 21,775.28, 32,621.81 and 12,864.02 is: 19,271.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.28 : 32,621.81 = 12,864.02 : x
  2. Step 2: Convert to fraction form
    21,775.28/32,621.81 = 12,864.02/x
  3. Step 3: Cross multiply
    21,775.28x = 32,621.81 × 12,864.02
  4. Step 4: Simplify right side
    21,775.28x = 419,647,388.85
  5. Step 5: Solve for x
    x = 419,647,388.85/21,775.28
  6. Step 6: Final answer
    x = 19,271.74

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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.