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Finding the Fourth Proportional to 18,695.45, 25,770.95 and 12,311.03

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Solution

The fourth proportional to 18,695.45, 25,770.95 and 12,311.03 is: 16,970.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.45 : 25,770.95 = 12,311.03 : x
  2. Step 2: Convert to fraction form
    18,695.45/25,770.95 = 12,311.03/x
  3. Step 3: Cross multiply
    18,695.45x = 25,770.95 × 12,311.03
  4. Step 4: Simplify right side
    18,695.45x = 317,266,748.17
  5. Step 5: Solve for x
    x = 317,266,748.17/18,695.45
  6. Step 6: Final answer
    x = 16,970.27

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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.