Home / 19,878.15-27,424.08-11,375.72

Finding the Fourth Proportional to 19,878.15, 27,424.08 and 11,375.72

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Solution

The fourth proportional to 19,878.15, 27,424.08 and 11,375.72 is: 15,694.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.15 : 27,424.08 = 11,375.72 : x
  2. Step 2: Convert to fraction form
    19,878.15/27,424.08 = 11,375.72/x
  3. Step 3: Cross multiply
    19,878.15x = 27,424.08 × 11,375.72
  4. Step 4: Simplify right side
    19,878.15x = 311,968,518.22
  5. Step 5: Solve for x
    x = 311,968,518.22/19,878.15
  6. Step 6: Final answer
    x = 15,694.04

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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.