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Finding the Fourth Proportional to 12,379.56, 16,989.06 and 12,292.08

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Solution

The fourth proportional to 12,379.56, 16,989.06 and 12,292.08 is: 16,869.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.56 : 16,989.06 = 12,292.08 : x
  2. Step 2: Convert to fraction form
    12,379.56/16,989.06 = 12,292.08/x
  3. Step 3: Cross multiply
    12,379.56x = 16,989.06 × 12,292.08
  4. Step 4: Simplify right side
    12,379.56x = 208,830,884.64
  5. Step 5: Solve for x
    x = 208,830,884.64/12,379.56
  6. Step 6: Final answer
    x = 16,869.01

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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.