Home / 19,878.08-27,435.20-11,499.52

Finding the Fourth Proportional to 19,878.08, 27,435.20 and 11,499.52

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Solution

The fourth proportional to 19,878.08, 27,435.20 and 11,499.52 is: 15,871.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.08 : 27,435.20 = 11,499.52 : x
  2. Step 2: Convert to fraction form
    19,878.08/27,435.20 = 11,499.52/x
  3. Step 3: Cross multiply
    19,878.08x = 27,435.20 × 11,499.52
  4. Step 4: Simplify right side
    19,878.08x = 315,491,631.10
  5. Step 5: Solve for x
    x = 315,491,631.10/19,878.08
  6. Step 6: Final answer
    x = 15,871.33

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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.