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Finding the Fourth Proportional to 12,153.78, 16,769.97 and 7,117.74

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Solution

The fourth proportional to 12,153.78, 16,769.97 and 7,117.74 is: 9,821.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,153.78 : 16,769.97 = 7,117.74 : x
  2. Step 2: Convert to fraction form
    12,153.78/16,769.97 = 7,117.74/x
  3. Step 3: Cross multiply
    12,153.78x = 16,769.97 × 7,117.74
  4. Step 4: Simplify right side
    12,153.78x = 119,364,286.27
  5. Step 5: Solve for x
    x = 119,364,286.27/12,153.78
  6. Step 6: Final answer
    x = 9,821.17

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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.