Home / 8,128.48-12,186-3,742.24

Finding the Fourth Proportional to 8,128.48, 12,186 and 3,742.24

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Solution

The fourth proportional to 8,128.48, 12,186 and 3,742.24 is: 5,610.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.48 : 12,186 = 3,742.24 : x
  2. Step 2: Convert to fraction form
    8,128.48/12,186 = 3,742.24/x
  3. Step 3: Cross multiply
    8,128.48x = 12,186 × 3,742.24
  4. Step 4: Simplify right side
    8,128.48x = 45,602,936.64
  5. Step 5: Solve for x
    x = 45,602,936.64/8,128.48
  6. Step 6: Final answer
    x = 5,610.27

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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.