Home / 20,894.12-31,330.84-6,660.76

Finding the Fourth Proportional to 20,894.12, 31,330.84 and 6,660.76

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Solution

The fourth proportional to 20,894.12, 31,330.84 and 6,660.76 is: 9,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.12 : 31,330.84 = 6,660.76 : x
  2. Step 2: Convert to fraction form
    20,894.12/31,330.84 = 6,660.76/x
  3. Step 3: Cross multiply
    20,894.12x = 31,330.84 × 6,660.76
  4. Step 4: Simplify right side
    20,894.12x = 208,687,205.84
  5. Step 5: Solve for x
    x = 208,687,205.84/20,894.12
  6. Step 6: Final answer
    x = 9,987.84

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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.