Home / 11,190.41-16,753.21-8,428.71

Finding the Fourth Proportional to 11,190.41, 16,753.21 and 8,428.71

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Solution

The fourth proportional to 11,190.41, 16,753.21 and 8,428.71 is: 12,618.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,190.41 : 16,753.21 = 8,428.71 : x
  2. Step 2: Convert to fraction form
    11,190.41/16,753.21 = 8,428.71/x
  3. Step 3: Cross multiply
    11,190.41x = 16,753.21 × 8,428.71
  4. Step 4: Simplify right side
    11,190.41x = 141,207,948.66
  5. Step 5: Solve for x
    x = 141,207,948.66/11,190.41
  6. Step 6: Final answer
    x = 12,618.66

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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.