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Finding the Fourth Proportional to 18,678.95, 25,766.93 and 11,957.34

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Solution

The fourth proportional to 18,678.95, 25,766.93 and 11,957.34 is: 16,494.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.95 : 25,766.93 = 11,957.34 : x
  2. Step 2: Convert to fraction form
    18,678.95/25,766.93 = 11,957.34/x
  3. Step 3: Cross multiply
    18,678.95x = 25,766.93 × 11,957.34
  4. Step 4: Simplify right side
    18,678.95x = 308,103,882.98
  5. Step 5: Solve for x
    x = 308,103,882.98/18,678.95
  6. Step 6: Final answer
    x = 16,494.72

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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.