Home / 20,520.04-30,780.06-11,748.88

Finding the Fourth Proportional to 20,520.04, 30,780.06 and 11,748.88

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Solution

The fourth proportional to 20,520.04, 30,780.06 and 11,748.88 is: 17,623.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.04 : 30,780.06 = 11,748.88 : x
  2. Step 2: Convert to fraction form
    20,520.04/30,780.06 = 11,748.88/x
  3. Step 3: Cross multiply
    20,520.04x = 30,780.06 × 11,748.88
  4. Step 4: Simplify right side
    20,520.04x = 361,631,231.33
  5. Step 5: Solve for x
    x = 361,631,231.33/20,520.04
  6. Step 6: Final answer
    x = 17,623.32

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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.