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Finding the Fourth Proportional to 18,471.42, 25,490.07 and 16,985.34

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Solution

The fourth proportional to 18,471.42, 25,490.07 and 16,985.34 is: 23,439.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.42 : 25,490.07 = 16,985.34 : x
  2. Step 2: Convert to fraction form
    18,471.42/25,490.07 = 16,985.34/x
  3. Step 3: Cross multiply
    18,471.42x = 25,490.07 × 16,985.34
  4. Step 4: Simplify right side
    18,471.42x = 432,957,505.57
  5. Step 5: Solve for x
    x = 432,957,505.57/18,471.42
  6. Step 6: Final answer
    x = 23,439.32

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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.