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Finding the Fourth Proportional to 12,666.96, 17,486.64 and 7,953.84

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Solution

The fourth proportional to 12,666.96, 17,486.64 and 7,953.84 is: 10,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.96 : 17,486.64 = 7,953.84 : x
  2. Step 2: Convert to fraction form
    12,666.96/17,486.64 = 7,953.84/x
  3. Step 3: Cross multiply
    12,666.96x = 17,486.64 × 7,953.84
  4. Step 4: Simplify right side
    12,666.96x = 139,085,936.70
  5. Step 5: Solve for x
    x = 139,085,936.70/12,666.96
  6. Step 6: Final answer
    x = 10,980.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.