Home / 12,120.76-16,720.74-8,585.80

Finding the Fourth Proportional to 12,120.76, 16,720.74 and 8,585.80

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Solution

The fourth proportional to 12,120.76, 16,720.74 and 8,585.80 is: 11,844.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.76 : 16,720.74 = 8,585.80 : x
  2. Step 2: Convert to fraction form
    12,120.76/16,720.74 = 8,585.80/x
  3. Step 3: Cross multiply
    12,120.76x = 16,720.74 × 8,585.80
  4. Step 4: Simplify right side
    12,120.76x = 143,560,929.49
  5. Step 5: Solve for x
    x = 143,560,929.49/12,120.76
  6. Step 6: Final answer
    x = 11,844.22

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Half scale
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Double scale
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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.