Home / 20,740.04-31,101.20-7,908.80

Finding the Fourth Proportional to 20,740.04, 31,101.20 and 7,908.80

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Solution

The fourth proportional to 20,740.04, 31,101.20 and 7,908.80 is: 11,859.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.04 : 31,101.20 = 7,908.80 : x
  2. Step 2: Convert to fraction form
    20,740.04/31,101.20 = 7,908.80/x
  3. Step 3: Cross multiply
    20,740.04x = 31,101.20 × 7,908.80
  4. Step 4: Simplify right side
    20,740.04x = 245,973,170.56
  5. Step 5: Solve for x
    x = 245,973,170.56/20,740.04
  6. Step 6: Final answer
    x = 11,859.82

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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.