Home / 12,886.38-19,330.33-4,120.61

Finding the Fourth Proportional to 12,886.38, 19,330.33 and 4,120.61

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Solution

The fourth proportional to 12,886.38, 19,330.33 and 4,120.61 is: 6,181.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.38 : 19,330.33 = 4,120.61 : x
  2. Step 2: Convert to fraction form
    12,886.38/19,330.33 = 4,120.61/x
  3. Step 3: Cross multiply
    12,886.38x = 19,330.33 × 4,120.61
  4. Step 4: Simplify right side
    12,886.38x = 79,652,751.10
  5. Step 5: Solve for x
    x = 79,652,751.10/12,886.38
  6. Step 6: Final answer
    x = 6,181.16

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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.