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Finding the Fourth Proportional to 18,687.64, 25,787.04 and 10,731.06

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Solution

The fourth proportional to 18,687.64, 25,787.04 and 10,731.06 is: 14,807.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.64 : 25,787.04 = 10,731.06 : x
  2. Step 2: Convert to fraction form
    18,687.64/25,787.04 = 10,731.06/x
  3. Step 3: Cross multiply
    18,687.64x = 25,787.04 × 10,731.06
  4. Step 4: Simplify right side
    18,687.64x = 276,722,273.46
  5. Step 5: Solve for x
    x = 276,722,273.46/18,687.64
  6. Step 6: Final answer
    x = 14,807.77

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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.