Home / 20,878.30-28,804.95-11,919.36

Finding the Fourth Proportional to 20,878.30, 28,804.95 and 11,919.36

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Solution

The fourth proportional to 20,878.30, 28,804.95 and 11,919.36 is: 16,444.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.30 : 28,804.95 = 11,919.36 : x
  2. Step 2: Convert to fraction form
    20,878.30/28,804.95 = 11,919.36/x
  3. Step 3: Cross multiply
    20,878.30x = 28,804.95 × 11,919.36
  4. Step 4: Simplify right side
    20,878.30x = 343,336,568.83
  5. Step 5: Solve for x
    x = 343,336,568.83/20,878.30
  6. Step 6: Final answer
    x = 16,444.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.