Home / 21,011.35-31,517.58-6,972.38

Finding the Fourth Proportional to 21,011.35, 31,517.58 and 6,972.38

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Solution

The fourth proportional to 21,011.35, 31,517.58 and 6,972.38 is: 10,458.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.35 : 31,517.58 = 6,972.38 : x
  2. Step 2: Convert to fraction form
    21,011.35/31,517.58 = 6,972.38/x
  3. Step 3: Cross multiply
    21,011.35x = 31,517.58 × 6,972.38
  4. Step 4: Simplify right side
    21,011.35x = 219,752,544.44
  5. Step 5: Solve for x
    x = 219,752,544.44/21,011.35
  6. Step 6: Final answer
    x = 10,458.75

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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.