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Finding the Fourth Proportional to 12,210.94, 16,851.12 and 6,621.94

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Solution

The fourth proportional to 12,210.94, 16,851.12 and 6,621.94 is: 9,138.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.94 : 16,851.12 = 6,621.94 : x
  2. Step 2: Convert to fraction form
    12,210.94/16,851.12 = 6,621.94/x
  3. Step 3: Cross multiply
    12,210.94x = 16,851.12 × 6,621.94
  4. Step 4: Simplify right side
    12,210.94x = 111,587,021.32
  5. Step 5: Solve for x
    x = 111,587,021.32/12,210.94
  6. Step 6: Final answer
    x = 9,138.29

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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.