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Finding the Fourth Proportional to 12,617.81, 17,415.64 and 7,315.68

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Solution

The fourth proportional to 12,617.81, 17,415.64 and 7,315.68 is: 10,097.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.81 : 17,415.64 = 7,315.68 : x
  2. Step 2: Convert to fraction form
    12,617.81/17,415.64 = 7,315.68/x
  3. Step 3: Cross multiply
    12,617.81x = 17,415.64 × 7,315.68
  4. Step 4: Simplify right side
    12,617.81x = 127,407,323.69
  5. Step 5: Solve for x
    x = 127,407,323.69/12,617.81
  6. Step 6: Final answer
    x = 10,097.42

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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.