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Finding the Fourth Proportional to 12,162.39, 16,775.39 and 7,905.51

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Solution

The fourth proportional to 12,162.39, 16,775.39 and 7,905.51 is: 10,903.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.39 : 16,775.39 = 7,905.51 : x
  2. Step 2: Convert to fraction form
    12,162.39/16,775.39 = 7,905.51/x
  3. Step 3: Cross multiply
    12,162.39x = 16,775.39 × 7,905.51
  4. Step 4: Simplify right side
    12,162.39x = 132,618,013.40
  5. Step 5: Solve for x
    x = 132,618,013.40/12,162.39
  6. Step 6: Final answer
    x = 10,903.94

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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.