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Finding the Fourth Proportional to 8,742.74, 13,123.83 and 8,606.66

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Solution

The fourth proportional to 8,742.74, 13,123.83 and 8,606.66 is: 12,919.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,742.74 : 13,123.83 = 8,606.66 : x
  2. Step 2: Convert to fraction form
    8,742.74/13,123.83 = 8,606.66/x
  3. Step 3: Cross multiply
    8,742.74x = 13,123.83 × 8,606.66
  4. Step 4: Simplify right side
    8,742.74x = 112,952,342.71
  5. Step 5: Solve for x
    x = 112,952,342.71/8,742.74
  6. Step 6: Final answer
    x = 12,919.56

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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.