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Finding the Fourth Proportional to 18,770.40, 25,876.80 and 11,692.08

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Solution

The fourth proportional to 18,770.40, 25,876.80 and 11,692.08 is: 16,118.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.40 : 25,876.80 = 11,692.08 : x
  2. Step 2: Convert to fraction form
    18,770.40/25,876.80 = 11,692.08/x
  3. Step 3: Cross multiply
    18,770.40x = 25,876.80 × 11,692.08
  4. Step 4: Simplify right side
    18,770.40x = 302,553,615.74
  5. Step 5: Solve for x
    x = 302,553,615.74/18,770.40
  6. Step 6: Final answer
    x = 16,118.66

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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.