Home / 30,532.72-45,721.32-20,112.88

Finding the Fourth Proportional to 30,532.72, 45,721.32 and 20,112.88

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Solution

The fourth proportional to 30,532.72, 45,721.32 and 20,112.88 is: 30,118.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,532.72 : 45,721.32 = 20,112.88 : x
  2. Step 2: Convert to fraction form
    30,532.72/45,721.32 = 20,112.88/x
  3. Step 3: Cross multiply
    30,532.72x = 45,721.32 × 20,112.88
  4. Step 4: Simplify right side
    30,532.72x = 919,587,422.60
  5. Step 5: Solve for x
    x = 919,587,422.60/30,532.72
  6. Step 6: Final answer
    x = 30,118.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.