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Finding the Fourth Proportional to 8,910.71, 12,313.06 and 8,478.37

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Solution

The fourth proportional to 8,910.71, 12,313.06 and 8,478.37 is: 11,715.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,910.71 : 12,313.06 = 8,478.37 : x
  2. Step 2: Convert to fraction form
    8,910.71/12,313.06 = 8,478.37/x
  3. Step 3: Cross multiply
    8,910.71x = 12,313.06 × 8,478.37
  4. Step 4: Simplify right side
    8,910.71x = 104,394,720.40
  5. Step 5: Solve for x
    x = 104,394,720.40/8,910.71
  6. Step 6: Final answer
    x = 11,715.65

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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.