Home / 19,878.12-27,431.87-10,926.54

Finding the Fourth Proportional to 19,878.12, 27,431.87 and 10,926.54

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Solution

The fourth proportional to 19,878.12, 27,431.87 and 10,926.54 is: 15,078.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.12 : 27,431.87 = 10,926.54 : x
  2. Step 2: Convert to fraction form
    19,878.12/27,431.87 = 10,926.54/x
  3. Step 3: Cross multiply
    19,878.12x = 27,431.87 × 10,926.54
  4. Step 4: Simplify right side
    19,878.12x = 299,735,370.20
  5. Step 5: Solve for x
    x = 299,735,370.20/19,878.12
  6. Step 6: Final answer
    x = 15,078.66

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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.