Home / 28,039.81-42,067.66-11,411.78

Finding the Fourth Proportional to 28,039.81, 42,067.66 and 11,411.78

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Solution

The fourth proportional to 28,039.81, 42,067.66 and 11,411.78 is: 17,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,039.81 : 42,067.66 = 11,411.78 : x
  2. Step 2: Convert to fraction form
    28,039.81/42,067.66 = 11,411.78/x
  3. Step 3: Cross multiply
    28,039.81x = 42,067.66 × 11,411.78
  4. Step 4: Simplify right side
    28,039.81x = 480,066,781.64
  5. Step 5: Solve for x
    x = 480,066,781.64/28,039.81
  6. Step 6: Final answer
    x = 17,120.90

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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.