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Finding the Fourth Proportional to 13,707.71, 18,912.65 and 8,607.44

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Solution

The fourth proportional to 13,707.71, 18,912.65 and 8,607.44 is: 11,875.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.71 : 18,912.65 = 8,607.44 : x
  2. Step 2: Convert to fraction form
    13,707.71/18,912.65 = 8,607.44/x
  3. Step 3: Cross multiply
    13,707.71x = 18,912.65 × 8,607.44
  4. Step 4: Simplify right side
    13,707.71x = 162,789,511.69
  5. Step 5: Solve for x
    x = 162,789,511.69/13,707.71
  6. Step 6: Final answer
    x = 11,875.77

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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.