Home / 19,930.83-27,504.77-10,978.40

Finding the Fourth Proportional to 19,930.83, 27,504.77 and 10,978.40

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Solution

The fourth proportional to 19,930.83, 27,504.77 and 10,978.40 is: 15,150.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.83 : 27,504.77 = 10,978.40 : x
  2. Step 2: Convert to fraction form
    19,930.83/27,504.77 = 10,978.40/x
  3. Step 3: Cross multiply
    19,930.83x = 27,504.77 × 10,978.40
  4. Step 4: Simplify right side
    19,930.83x = 301,958,380.84
  5. Step 5: Solve for x
    x = 301,958,380.84/19,930.83
  6. Step 6: Final answer
    x = 15,150.32

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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.