Home / 12,128.60-18,195.60-4,732.40

Finding the Fourth Proportional to 12,128.60, 18,195.60 and 4,732.40

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Solution

The fourth proportional to 12,128.60, 18,195.60 and 4,732.40 is: 7,099.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.60 : 18,195.60 = 4,732.40 : x
  2. Step 2: Convert to fraction form
    12,128.60/18,195.60 = 4,732.40/x
  3. Step 3: Cross multiply
    12,128.60x = 18,195.60 × 4,732.40
  4. Step 4: Simplify right side
    12,128.60x = 86,108,857.44
  5. Step 5: Solve for x
    x = 86,108,857.44/12,128.60
  6. Step 6: Final answer
    x = 7,099.65

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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.