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Finding the Fourth Proportional to 21,062.97, 31,597.70 and 7,916.27

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Solution

The fourth proportional to 21,062.97, 31,597.70 and 7,916.27 is: 11,875.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.97 : 31,597.70 = 7,916.27 : x
  2. Step 2: Convert to fraction form
    21,062.97/31,597.70 = 7,916.27/x
  3. Step 3: Cross multiply
    21,062.97x = 31,597.70 × 7,916.27
  4. Step 4: Simplify right side
    21,062.97x = 250,135,727.01
  5. Step 5: Solve for x
    x = 250,135,727.01/21,062.97
  6. Step 6: Final answer
    x = 11,875.62

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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.