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Finding the Fourth Proportional to 12,911.06, 17,808.78 and 7,602.14

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Solution

The fourth proportional to 12,911.06, 17,808.78 and 7,602.14 is: 10,485.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.06 : 17,808.78 = 7,602.14 : x
  2. Step 2: Convert to fraction form
    12,911.06/17,808.78 = 7,602.14/x
  3. Step 3: Cross multiply
    12,911.06x = 17,808.78 × 7,602.14
  4. Step 4: Simplify right side
    12,911.06x = 135,384,838.79
  5. Step 5: Solve for x
    x = 135,384,838.79/12,911.06
  6. Step 6: Final answer
    x = 10,485.96

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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.