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Finding the Fourth Proportional to 12,178.96, 18,161.50 and 12,068.08

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Solution

The fourth proportional to 12,178.96, 18,161.50 and 12,068.08 is: 17,996.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.96 : 18,161.50 = 12,068.08 : x
  2. Step 2: Convert to fraction form
    12,178.96/18,161.50 = 12,068.08/x
  3. Step 3: Cross multiply
    12,178.96x = 18,161.50 × 12,068.08
  4. Step 4: Simplify right side
    12,178.96x = 219,174,434.92
  5. Step 5: Solve for x
    x = 219,174,434.92/12,178.96
  6. Step 6: Final answer
    x = 17,996.15

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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.