Home / 12,156.40-18,234.60-9,677.80

Finding the Fourth Proportional to 12,156.40, 18,234.60 and 9,677.80

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Solution

The fourth proportional to 12,156.40, 18,234.60 and 9,677.80 is: 14,516.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.40 : 18,234.60 = 9,677.80 : x
  2. Step 2: Convert to fraction form
    12,156.40/18,234.60 = 9,677.80/x
  3. Step 3: Cross multiply
    12,156.40x = 18,234.60 × 9,677.80
  4. Step 4: Simplify right side
    12,156.40x = 176,470,811.88
  5. Step 5: Solve for x
    x = 176,470,811.88/12,156.40
  6. Step 6: Final answer
    x = 14,516.70

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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.