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Finding the Fourth Proportional to 11,279.40, 16,886.70 and 9,983.40

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Solution

The fourth proportional to 11,279.40, 16,886.70 and 9,983.40 is: 14,946.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,279.40 : 16,886.70 = 9,983.40 : x
  2. Step 2: Convert to fraction form
    11,279.40/16,886.70 = 9,983.40/x
  3. Step 3: Cross multiply
    11,279.40x = 16,886.70 × 9,983.40
  4. Step 4: Simplify right side
    11,279.40x = 168,586,680.78
  5. Step 5: Solve for x
    x = 168,586,680.78/11,279.40
  6. Step 6: Final answer
    x = 14,946.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.