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Finding the Fourth Proportional to 12,588.51, 18,891.81 and 8,436.45

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Solution

The fourth proportional to 12,588.51, 18,891.81 and 8,436.45 is: 12,660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,588.51 : 18,891.81 = 8,436.45 : x
  2. Step 2: Convert to fraction form
    12,588.51/18,891.81 = 8,436.45/x
  3. Step 3: Cross multiply
    12,588.51x = 18,891.81 × 8,436.45
  4. Step 4: Simplify right side
    12,588.51x = 159,379,810.47
  5. Step 5: Solve for x
    x = 159,379,810.47/12,588.51
  6. Step 6: Final answer
    x = 12,660.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.