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Finding the Fourth Proportional to 8,507.80, 12,761.66 and 3,313.68

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Solution

The fourth proportional to 8,507.80, 12,761.66 and 3,313.68 is: 4,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,507.80 : 12,761.66 = 3,313.68 : x
  2. Step 2: Convert to fraction form
    8,507.80/12,761.66 = 3,313.68/x
  3. Step 3: Cross multiply
    8,507.80x = 12,761.66 × 3,313.68
  4. Step 4: Simplify right side
    8,507.80x = 42,288,057.51
  5. Step 5: Solve for x
    x = 42,288,057.51/8,507.80
  6. Step 6: Final answer
    x = 4,970.50

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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.