Home / 12,775.28-19,170.32-5,379.12

Finding the Fourth Proportional to 12,775.28, 19,170.32 and 5,379.12

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Solution

The fourth proportional to 12,775.28, 19,170.32 and 5,379.12 is: 8,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,775.28 : 19,170.32 = 5,379.12 : x
  2. Step 2: Convert to fraction form
    12,775.28/19,170.32 = 5,379.12/x
  3. Step 3: Cross multiply
    12,775.28x = 19,170.32 × 5,379.12
  4. Step 4: Simplify right side
    12,775.28x = 103,119,451.72
  5. Step 5: Solve for x
    x = 103,119,451.72/12,775.28
  6. Step 6: Final answer
    x = 8,071.80

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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.