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Finding the Fourth Proportional to 12,220.55, 16,864.27 and 6,631.55

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Solution

The fourth proportional to 12,220.55, 16,864.27 and 6,631.55 is: 9,151.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.55 : 16,864.27 = 6,631.55 : x
  2. Step 2: Convert to fraction form
    12,220.55/16,864.27 = 6,631.55/x
  3. Step 3: Cross multiply
    12,220.55x = 16,864.27 × 6,631.55
  4. Step 4: Simplify right side
    12,220.55x = 111,836,148.82
  5. Step 5: Solve for x
    x = 111,836,148.82/12,220.55
  6. Step 6: Final answer
    x = 9,151.49

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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.