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Finding the Fourth Proportional to 21,007.59, 31,516.28 and 6,966.59

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Solution

The fourth proportional to 21,007.59, 31,516.28 and 6,966.59 is: 10,451.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.59 : 31,516.28 = 6,966.59 : x
  2. Step 2: Convert to fraction form
    21,007.59/31,516.28 = 6,966.59/x
  3. Step 3: Cross multiply
    21,007.59x = 31,516.28 × 6,966.59
  4. Step 4: Simplify right side
    21,007.59x = 219,561,001.09
  5. Step 5: Solve for x
    x = 219,561,001.09/21,007.59
  6. Step 6: Final answer
    x = 10,451.51

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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.