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Finding the Fourth Proportional to 12,588.48, 18,810.36 and 8,661.60

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Solution

The fourth proportional to 12,588.48, 18,810.36 and 8,661.60 is: 12,942.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,588.48 : 18,810.36 = 8,661.60 : x
  2. Step 2: Convert to fraction form
    12,588.48/18,810.36 = 8,661.60/x
  3. Step 3: Cross multiply
    12,588.48x = 18,810.36 × 8,661.60
  4. Step 4: Simplify right side
    12,588.48x = 162,927,814.18
  5. Step 5: Solve for x
    x = 162,927,814.18/12,588.48
  6. Step 6: Final answer
    x = 12,942.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.