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Finding the Fourth Proportional to 12,942.02, 17,858.99 and 7,908.68

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Solution

The fourth proportional to 12,942.02, 17,858.99 and 7,908.68 is: 10,913.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942.02 : 17,858.99 = 7,908.68 : x
  2. Step 2: Convert to fraction form
    12,942.02/17,858.99 = 7,908.68/x
  3. Step 3: Cross multiply
    12,942.02x = 17,858.99 × 7,908.68
  4. Step 4: Simplify right side
    12,942.02x = 141,240,908.19
  5. Step 5: Solve for x
    x = 141,240,908.19/12,942.02
  6. Step 6: Final answer
    x = 10,913.36

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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.