Home / 12,664.20-18,988.20-5,271.60

Finding the Fourth Proportional to 12,664.20, 18,988.20 and 5,271.60

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Solution

The fourth proportional to 12,664.20, 18,988.20 and 5,271.60 is: 7,904.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,664.20 : 18,988.20 = 5,271.60 : x
  2. Step 2: Convert to fraction form
    12,664.20/18,988.20 = 5,271.60/x
  3. Step 3: Cross multiply
    12,664.20x = 18,988.20 × 5,271.60
  4. Step 4: Simplify right side
    12,664.20x = 100,098,195.12
  5. Step 5: Solve for x
    x = 100,098,195.12/12,664.20
  6. Step 6: Final answer
    x = 7,904.03

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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.