Home / 11,053.20-16,579.80-8,428.80

Finding the Fourth Proportional to 11,053.20, 16,579.80 and 8,428.80

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Solution

The fourth proportional to 11,053.20, 16,579.80 and 8,428.80 is: 12,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,053.20 : 16,579.80 = 8,428.80 : x
  2. Step 2: Convert to fraction form
    11,053.20/16,579.80 = 8,428.80/x
  3. Step 3: Cross multiply
    11,053.20x = 16,579.80 × 8,428.80
  4. Step 4: Simplify right side
    11,053.20x = 139,747,818.24
  5. Step 5: Solve for x
    x = 139,747,818.24/11,053.20
  6. Step 6: Final answer
    x = 12,643.20

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Similar ratio
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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.