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Finding the Fourth Proportional to 12,636.81, 18,971.62 and 9,717.17

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Solution

The fourth proportional to 12,636.81, 18,971.62 and 9,717.17 is: 14,588.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.81 : 18,971.62 = 9,717.17 : x
  2. Step 2: Convert to fraction form
    12,636.81/18,971.62 = 9,717.17/x
  3. Step 3: Cross multiply
    12,636.81x = 18,971.62 × 9,717.17
  4. Step 4: Simplify right side
    12,636.81x = 184,350,337.56
  5. Step 5: Solve for x
    x = 184,350,337.56/12,636.81
  6. Step 6: Final answer
    x = 14,588.36

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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.