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Finding the Fourth Proportional to 12,220.72, 16,864.58 and 6,631.72

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Solution

The fourth proportional to 12,220.72, 16,864.58 and 6,631.72 is: 9,151.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.72 : 16,864.58 = 6,631.72 : x
  2. Step 2: Convert to fraction form
    12,220.72/16,864.58 = 6,631.72/x
  3. Step 3: Cross multiply
    12,220.72x = 16,864.58 × 6,631.72
  4. Step 4: Simplify right side
    12,220.72x = 111,841,172.48
  5. Step 5: Solve for x
    x = 111,841,172.48/12,220.72
  6. Step 6: Final answer
    x = 9,151.77

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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.