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Finding the Fourth Proportional to 15,717.92, 21,694.03 and 9,971.64

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Solution

The fourth proportional to 15,717.92, 21,694.03 and 9,971.64 is: 13,762.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.92 : 21,694.03 = 9,971.64 : x
  2. Step 2: Convert to fraction form
    15,717.92/21,694.03 = 9,971.64/x
  3. Step 3: Cross multiply
    15,717.92x = 21,694.03 × 9,971.64
  4. Step 4: Simplify right side
    15,717.92x = 216,325,032.38
  5. Step 5: Solve for x
    x = 216,325,032.38/15,717.92
  6. Step 6: Final answer
    x = 13,762.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.