Home / 30,538.72-45,730.32-20,118.88

Finding the Fourth Proportional to 30,538.72, 45,730.32 and 20,118.88

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Solution

The fourth proportional to 30,538.72, 45,730.32 and 20,118.88 is: 30,127.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,538.72 : 45,730.32 = 20,118.88 : x
  2. Step 2: Convert to fraction form
    30,538.72/45,730.32 = 20,118.88/x
  3. Step 3: Cross multiply
    30,538.72x = 45,730.32 × 20,118.88
  4. Step 4: Simplify right side
    30,538.72x = 920,042,820.44
  5. Step 5: Solve for x
    x = 920,042,820.44/30,538.72
  6. Step 6: Final answer
    x = 30,127.09

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1.5x scale

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.