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Finding the Fourth Proportional to 12,996.81, 17,936.63 and 7,407.69

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Solution

The fourth proportional to 12,996.81, 17,936.63 and 7,407.69 is: 10,223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,996.81 : 17,936.63 = 7,407.69 : x
  2. Step 2: Convert to fraction form
    12,996.81/17,936.63 = 7,407.69/x
  3. Step 3: Cross multiply
    12,996.81x = 17,936.63 × 7,407.69
  4. Step 4: Simplify right side
    12,996.81x = 132,868,957.65
  5. Step 5: Solve for x
    x = 132,868,957.65/12,996.81
  6. Step 6: Final answer
    x = 10,223.20

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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.