Home / 12,128.18-18,181.22-4,335.16

Finding the Fourth Proportional to 12,128.18, 18,181.22 and 4,335.16

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Solution

The fourth proportional to 12,128.18, 18,181.22 and 4,335.16 is: 6,498.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.18 : 18,181.22 = 4,335.16 : x
  2. Step 2: Convert to fraction form
    12,128.18/18,181.22 = 4,335.16/x
  3. Step 3: Cross multiply
    12,128.18x = 18,181.22 × 4,335.16
  4. Step 4: Simplify right side
    12,128.18x = 78,818,497.70
  5. Step 5: Solve for x
    x = 78,818,497.70/12,128.18
  6. Step 6: Final answer
    x = 6,498.79

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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.