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Finding the Fourth Proportional to 18,686.66, 25,787.27 and 10,188.85

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Solution

The fourth proportional to 18,686.66, 25,787.27 and 10,188.85 is: 14,060.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.66 : 25,787.27 = 10,188.85 : x
  2. Step 2: Convert to fraction form
    18,686.66/25,787.27 = 10,188.85/x
  3. Step 3: Cross multiply
    18,686.66x = 25,787.27 × 10,188.85
  4. Step 4: Simplify right side
    18,686.66x = 262,742,625.94
  5. Step 5: Solve for x
    x = 262,742,625.94/18,686.66
  6. Step 6: Final answer
    x = 14,060.44

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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.