Home / 12,576.40-18,864.60-5,179.12

Finding the Fourth Proportional to 12,576.40, 18,864.60 and 5,179.12

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Solution

The fourth proportional to 12,576.40, 18,864.60 and 5,179.12 is: 7,768.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,576.40 : 18,864.60 = 5,179.12 : x
  2. Step 2: Convert to fraction form
    12,576.40/18,864.60 = 5,179.12/x
  3. Step 3: Cross multiply
    12,576.40x = 18,864.60 × 5,179.12
  4. Step 4: Simplify right side
    12,576.40x = 97,702,027.15
  5. Step 5: Solve for x
    x = 97,702,027.15/12,576.40
  6. Step 6: Final answer
    x = 7,768.68

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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.