Home / 12,156.20-16,770.81-8,977.15

Finding the Fourth Proportional to 12,156.20, 16,770.81 and 8,977.15

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Solution

The fourth proportional to 12,156.20, 16,770.81 and 8,977.15 is: 12,384.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.20 : 16,770.81 = 8,977.15 : x
  2. Step 2: Convert to fraction form
    12,156.20/16,770.81 = 8,977.15/x
  3. Step 3: Cross multiply
    12,156.20x = 16,770.81 × 8,977.15
  4. Step 4: Simplify right side
    12,156.20x = 150,554,076.99
  5. Step 5: Solve for x
    x = 150,554,076.99/12,156.20
  6. Step 6: Final answer
    x = 12,384.96

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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.