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Finding the Fourth Proportional to 12,220.90, 16,864.83 and 6,631.90

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Solution

The fourth proportional to 12,220.90, 16,864.83 and 6,631.90 is: 9,152.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.90 : 16,864.83 = 6,631.90 : x
  2. Step 2: Convert to fraction form
    12,220.90/16,864.83 = 6,631.90/x
  3. Step 3: Cross multiply
    12,220.90x = 16,864.83 × 6,631.90
  4. Step 4: Simplify right side
    12,220.90x = 111,845,866.08
  5. Step 5: Solve for x
    x = 111,845,866.08/12,220.90
  6. Step 6: Final answer
    x = 9,152.02

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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.