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Finding the Fourth Proportional to 12,661.65, 17,346.17 and 12,188.39

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Solution

The fourth proportional to 12,661.65, 17,346.17 and 12,188.39 is: 16,697.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.65 : 17,346.17 = 12,188.39 : x
  2. Step 2: Convert to fraction form
    12,661.65/17,346.17 = 12,188.39/x
  3. Step 3: Cross multiply
    12,661.65x = 17,346.17 × 12,188.39
  4. Step 4: Simplify right side
    12,661.65x = 211,421,828.71
  5. Step 5: Solve for x
    x = 211,421,828.71/12,661.65
  6. Step 6: Final answer
    x = 16,697.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.