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Finding the Fourth Proportional to 12,210.70, 16,850.74 and 6,621.70

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Solution

The fourth proportional to 12,210.70, 16,850.74 and 6,621.70 is: 9,137.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.70 : 16,850.74 = 6,621.70 : x
  2. Step 2: Convert to fraction form
    12,210.70/16,850.74 = 6,621.70/x
  3. Step 3: Cross multiply
    12,210.70x = 16,850.74 × 6,621.70
  4. Step 4: Simplify right side
    12,210.70x = 111,580,545.06
  5. Step 5: Solve for x
    x = 111,580,545.06/12,210.70
  6. Step 6: Final answer
    x = 9,137.93

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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.