Home / 12,278.18-18,428.70-8,771.60

Finding the Fourth Proportional to 12,278.18, 18,428.70 and 8,771.60

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Solution

The fourth proportional to 12,278.18, 18,428.70 and 8,771.60 is: 13,165.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.18 : 18,428.70 = 8,771.60 : x
  2. Step 2: Convert to fraction form
    12,278.18/18,428.70 = 8,771.60/x
  3. Step 3: Cross multiply
    12,278.18x = 18,428.70 × 8,771.60
  4. Step 4: Simplify right side
    12,278.18x = 161,649,184.92
  5. Step 5: Solve for x
    x = 161,649,184.92/12,278.18
  6. Step 6: Final answer
    x = 13,165.57

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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.