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Finding the Fourth Proportional to 18,638.71, 25,692.24 and 12,660.00

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Solution

The fourth proportional to 18,638.71, 25,692.24 and 12,660.00 is: 17,450.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.71 : 25,692.24 = 12,660.00 : x
  2. Step 2: Convert to fraction form
    18,638.71/25,692.24 = 12,660.00/x
  3. Step 3: Cross multiply
    18,638.71x = 25,692.24 × 12,660.00
  4. Step 4: Simplify right side
    18,638.71x = 325,263,638.32
  5. Step 5: Solve for x
    x = 325,263,638.32/18,638.71
  6. Step 6: Final answer
    x = 17,450.98

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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.