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Finding the Fourth Proportional to 18,772.76, 25,912.17 and 10,820.28

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Solution

The fourth proportional to 18,772.76, 25,912.17 and 10,820.28 is: 14,935.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.76 : 25,912.17 = 10,820.28 : x
  2. Step 2: Convert to fraction form
    18,772.76/25,912.17 = 10,820.28/x
  3. Step 3: Cross multiply
    18,772.76x = 25,912.17 × 10,820.28
  4. Step 4: Simplify right side
    18,772.76x = 280,376,934.81
  5. Step 5: Solve for x
    x = 280,376,934.81/18,772.76
  6. Step 6: Final answer
    x = 14,935.31

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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.