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Finding the Fourth Proportional to 21,007.09, 31,515.53 and 6,966.09

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Solution

The fourth proportional to 21,007.09, 31,515.53 and 6,966.09 is: 10,450.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.09 : 31,515.53 = 6,966.09 : x
  2. Step 2: Convert to fraction form
    21,007.09/31,515.53 = 6,966.09/x
  3. Step 3: Cross multiply
    21,007.09x = 31,515.53 × 6,966.09
  4. Step 4: Simplify right side
    21,007.09x = 219,540,018.38
  5. Step 5: Solve for x
    x = 219,540,018.38/21,007.09
  6. Step 6: Final answer
    x = 10,450.76

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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.