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Finding the Fourth Proportional to 18,871.56, 26,043.30 and 10,916.28

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Solution

The fourth proportional to 18,871.56, 26,043.30 and 10,916.28 is: 15,064.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.56 : 26,043.30 = 10,916.28 : x
  2. Step 2: Convert to fraction form
    18,871.56/26,043.30 = 10,916.28/x
  3. Step 3: Cross multiply
    18,871.56x = 26,043.30 × 10,916.28
  4. Step 4: Simplify right side
    18,871.56x = 284,295,954.92
  5. Step 5: Solve for x
    x = 284,295,954.92/18,871.56
  6. Step 6: Final answer
    x = 15,064.78

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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.