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Finding the Fourth Proportional to 10,511.60, 15,738.60 and 8,207.60

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Solution

The fourth proportional to 10,511.60, 15,738.60 and 8,207.60 is: 12,288.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,511.60 : 15,738.60 = 8,207.60 : x
  2. Step 2: Convert to fraction form
    10,511.60/15,738.60 = 8,207.60/x
  3. Step 3: Cross multiply
    10,511.60x = 15,738.60 × 8,207.60
  4. Step 4: Simplify right side
    10,511.60x = 129,176,133.36
  5. Step 5: Solve for x
    x = 129,176,133.36/10,511.60
  6. Step 6: Final answer
    x = 12,288.91

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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.