Home / 19,930.64-27,504.32-10,978.12

Finding the Fourth Proportional to 19,930.64, 27,504.32 and 10,978.12

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Solution

The fourth proportional to 19,930.64, 27,504.32 and 10,978.12 is: 15,149.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.64 : 27,504.32 = 10,978.12 : x
  2. Step 2: Convert to fraction form
    19,930.64/27,504.32 = 10,978.12/x
  3. Step 3: Cross multiply
    19,930.64x = 27,504.32 × 10,978.12
  4. Step 4: Simplify right side
    19,930.64x = 301,945,725.48
  5. Step 5: Solve for x
    x = 301,945,725.48/19,930.64
  6. Step 6: Final answer
    x = 15,149.83

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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.