Home / 19,930.82-27,503.51-10,978.13

Finding the Fourth Proportional to 19,930.82, 27,503.51 and 10,978.13

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Solution

The fourth proportional to 19,930.82, 27,503.51 and 10,978.13 is: 15,149.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.82 : 27,503.51 = 10,978.13 : x
  2. Step 2: Convert to fraction form
    19,930.82/27,503.51 = 10,978.13/x
  3. Step 3: Cross multiply
    19,930.82x = 27,503.51 × 10,978.13
  4. Step 4: Simplify right side
    19,930.82x = 301,936,998.16
  5. Step 5: Solve for x
    x = 301,936,998.16/19,930.82
  6. Step 6: Final answer
    x = 15,149.25

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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.