Home / 30,553.20-42,165.36-19,971.36

Finding the Fourth Proportional to 30,553.20, 42,165.36 and 19,971.36

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Solution

The fourth proportional to 30,553.20, 42,165.36 and 19,971.36 is: 27,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,553.20 : 42,165.36 = 19,971.36 : x
  2. Step 2: Convert to fraction form
    30,553.20/42,165.36 = 19,971.36/x
  3. Step 3: Cross multiply
    30,553.20x = 42,165.36 × 19,971.36
  4. Step 4: Simplify right side
    30,553.20x = 842,099,584.09
  5. Step 5: Solve for x
    x = 842,099,584.09/30,553.20
  6. Step 6: Final answer
    x = 27,561.75

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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.