Home / 12,671.42-18,988.58-7,135.56

Finding the Fourth Proportional to 12,671.42, 18,988.58 and 7,135.56

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Solution

The fourth proportional to 12,671.42, 18,988.58 and 7,135.56 is: 10,692.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.42 : 18,988.58 = 7,135.56 : x
  2. Step 2: Convert to fraction form
    12,671.42/18,988.58 = 7,135.56/x
  3. Step 3: Cross multiply
    12,671.42x = 18,988.58 × 7,135.56
  4. Step 4: Simplify right side
    12,671.42x = 135,494,151.90
  5. Step 5: Solve for x
    x = 135,494,151.90/12,671.42
  6. Step 6: Final answer
    x = 10,692.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.